diff --git a/library/Core.cpp b/library/Core.cpp
index 49aa61ecd..62ede1162 100644
--- a/library/Core.cpp
+++ b/library/Core.cpp
@@ -1339,7 +1339,7 @@ command_result Core::runCommand(color_ostream &con, const std::string &first_, v
                             con.printerr("that is not loaded - try \"load %s\" or check stderr.log\n",
                                 first.c_str());
                         else if (p->size())
-                            con.printerr("that implements %i commands - see \"ls %s\" for details\n",
+                            con.printerr("that implements %zi commands - see \"ls %s\" for details\n",
                                 p->size(), first.c_str());
                         else
                             con.printerr("but does not implement any commands\n");
diff --git a/library/LuaWrapper.cpp b/library/LuaWrapper.cpp
index fe8309736..ef41d8076 100644
--- a/library/LuaWrapper.cpp
+++ b/library/LuaWrapper.cpp
@@ -27,6 +27,7 @@ distribution.
 #include <string>
 #include <vector>
 #include <map>
+#include <cinttypes>
 
 #include "MemAccess.h"
 #include "Core.h"
@@ -1008,7 +1009,7 @@ static int meta_ptr_tostring(lua_State *state)
     const char *cname = lua_tostring(state, -1);
 
     if (has_length)
-        lua_pushstring(state, stl_sprintf("<%s[%llu]: %p>", cname, length, (void*)ptr).c_str());
+        lua_pushstring(state, stl_sprintf("<%s[%" PRIu64 "]: %p>", cname, length, (void*)ptr).c_str());
     else
         lua_pushstring(state, stl_sprintf("<%s: %p>", cname, (void*)ptr).c_str());
     return 1;
diff --git a/library/modules/Kitchen.cpp b/library/modules/Kitchen.cpp
index 705cb7bee..63372d564 100644
--- a/library/modules/Kitchen.cpp
+++ b/library/modules/Kitchen.cpp
@@ -33,7 +33,7 @@ void Kitchen::debug_print(color_ostream &out)
     out.print("Kitchen Exclusions\n");
     for(std::size_t i = 0; i < size(); ++i)
     {
-        out.print("%2u: IT:%2i IS:%i MT:%3i MI:%2i ET:%i %s\n",
+        out.print("%2zu: IT:%2i IS:%i MT:%3i MI:%2i ET:%i %s\n",
                        i,
                        ui->kitchen.item_types[i],
                        ui->kitchen.item_subtypes[i],
diff --git a/plugins/3dveins.cpp b/plugins/3dveins.cpp
index 0bd2cd6c1..929ee24f6 100644
--- a/plugins/3dveins.cpp
+++ b/plugins/3dveins.cpp
@@ -589,7 +589,7 @@ bool VeinGenerator::init_biomes()
 
         if (info.geo_index < 0 || !info.geobiome)
         {
-            out.printerr("Biome %d is not defined.\n", i);
+            out.printerr("Biome %zd is not defined.\n", i);
             return false;
         }
 
@@ -1567,7 +1567,7 @@ bool VeinGenerator::place_veins(bool verbose)
     sort(queue.begin(), queue.end(), vein_cmp);
 
     // Place tiles
-    out.print("Processing... ", queue.size());
+    out.print("Processing... (%zu)", queue.size());
 
     for (size_t j = 0; j < queue.size(); j++)
     {
@@ -1588,7 +1588,7 @@ bool VeinGenerator::place_veins(bool verbose)
                 out.print("done.");
 
             out.print(
-                "\nVein layer %d of %d: %s %s (%.2f%%)... ",
+                "\nVein layer %zu of %zu: %s %s (%.2f%%)... ",
                 j+1, queue.size(),
                 MaterialInfo(0,queue[j]->vein.first).getToken().c_str(),
                 ENUM_KEY_STR(inclusion_type, queue[j]->vein.second).c_str(),
@@ -1597,7 +1597,7 @@ bool VeinGenerator::place_veins(bool verbose)
         }
         else
         {
-            out.print("\rVein layer %d of %d... ", j+1, queue.size());
+            out.print("\rVein layer %zu of %zu... ", j+1, queue.size());
             out.flush();
         }
 
diff --git a/plugins/autolabor.cpp b/plugins/autolabor.cpp
index 936ce4022..09a756642 100644
--- a/plugins/autolabor.cpp
+++ b/plugins/autolabor.cpp
@@ -1497,7 +1497,7 @@ command_result autolabor (color_ostream &out, std::vector <std::string> & parame
 
         if (maximum < minimum || maximum < 0 || minimum < 0)
         {
-            out.printerr("Syntax: autolabor <labor> <minimum> [<maximum>] [<talent pool>]\n", maximum, minimum);
+            out.printerr("Syntax: autolabor <labor> <minimum> [<maximum>] [<talent pool>], %d > %d\n", maximum, minimum);
             return CR_WRONG_USAGE;
         }
 
diff --git a/plugins/burrows.cpp b/plugins/burrows.cpp
index 69325331e..3b1d3fe86 100644
--- a/plugins/burrows.cpp
+++ b/plugins/burrows.cpp
@@ -295,7 +295,7 @@ static void init_map(color_ostream &out)
     active = true;
 
     if (auto_grow && !grow_burrows.empty())
-        out.print("Auto-growing %d burrows.\n", grow_burrows.size());
+        out.print("Auto-growing %zu burrows.\n", grow_burrows.size());
 }
 
 static void deinit_map(color_ostream &out)
diff --git a/plugins/changelayer.cpp b/plugins/changelayer.cpp
index cf7d4fdbc..5c252b102 100644
--- a/plugins/changelayer.cpp
+++ b/plugins/changelayer.cpp
@@ -120,12 +120,12 @@ command_result changelayer (color_ostream &out, std::vector <std::string> & para
     {
         if(parameters[i] == "help" || parameters[i] == "?")
         {
-            out.print(changelayer_help.c_str());
+            out.print("%s",changelayer_help.c_str());
             return CR_OK;
         }
         if(parameters[i] == "trouble")
         {
-            out.print(changelayer_trouble.c_str());
+            out.print("%s",changelayer_trouble.c_str());
             return CR_OK;
         }
         if(parameters[i] == "force")
diff --git a/plugins/cleanowned.cpp b/plugins/cleanowned.cpp
index 4dd3fd212..90b0e743d 100644
--- a/plugins/cleanowned.cpp
+++ b/plugins/cleanowned.cpp
@@ -87,7 +87,7 @@ command_result df_cleanowned (color_ostream &out, vector <string> & parameters)
         return CR_FAILURE;
     }
 
-    out.print("Found total %d items.\n", world->items.all.size());
+    out.print("Found total %zd items.\n", world->items.all.size());
 
     for (std::size_t i=0; i < world->items.all.size(); i++)
     {
@@ -160,7 +160,7 @@ command_result df_cleanowned (color_ostream &out, vector <string> & parameters)
             std::string description;
             item->getItemDescription(&description, 0);
             out.print(
-                "0x%x %s (wear %d)",
+                "0x%p %s (wear %d)",
                 item,
                 description.c_str(),
                 item->getWear()
diff --git a/plugins/cursecheck.cpp b/plugins/cursecheck.cpp
index e006bd17c..89481a046 100644
--- a/plugins/cursecheck.cpp
+++ b/plugins/cursecheck.cpp
@@ -239,9 +239,9 @@ command_result cursecheck (color_ostream &out, vector <string> & parameters)
     }
 
     if (checkWholeMap)
-        out.print("Number of cursed creatures on map: %d \n", cursecount);
+        out.print("Number of cursed creatures on map: %zd \n", cursecount);
     else
-        out.print("Number of cursed creatures on tile: %d \n", cursecount);
+        out.print("Number of cursed creatures on tile: %zd \n", cursecount);
 
     return CR_OK;
 }
diff --git a/plugins/diggingInvaders/assignJob.cpp b/plugins/diggingInvaders/assignJob.cpp
index 2b780bd63..b253e7833 100644
--- a/plugins/diggingInvaders/assignJob.cpp
+++ b/plugins/diggingInvaders/assignJob.cpp
@@ -260,7 +260,7 @@ int32_t assignJob(color_ostream& out, Edge firstImportantEdge, unordered_map<df:
                 df::world_site::find(df::global::ui->site_id), 0);
 
             if ( out_items.size() != 1 ) {
-                out.print("%s, %d: wrong size: %d.\n", __FILE__, __LINE__, out_items.size());
+                out.print("%s, %d: wrong size: %zu.\n", __FILE__, __LINE__, out_items.size());
                 return -1;
             }
             out_items[0]->moveToGround(firstInvader->pos.x, firstInvader->pos.y, firstInvader->pos.z);
diff --git a/plugins/diggingInvaders/diggingInvaders.cpp b/plugins/diggingInvaders/diggingInvaders.cpp
index 9bbc5191e..7a5b94d2c 100644
--- a/plugins/diggingInvaders/diggingInvaders.cpp
+++ b/plugins/diggingInvaders/diggingInvaders.cpp
@@ -62,6 +62,7 @@
 #include <vector>
 #include <unordered_map>
 #include <unordered_set>
+#include <cinttypes>
 
 using namespace std;
 
@@ -301,7 +302,7 @@ command_result diggingInvadersCommand(color_ostream& out, std::vector<std::strin
             DigAbilities& abilities = digAbilities[raceString];
 
             df::coord bob = Gui::getCursorPos();
-            out.print("(%d,%d,%d), (%d,%d,%d): cost = %lld\n", lastDebugEdgeCostPoint.x, lastDebugEdgeCostPoint.y, lastDebugEdgeCostPoint.z, bob.x, bob.y, bob.z, getEdgeCost(out, lastDebugEdgeCostPoint, bob, abilities));
+            out.print("(%d,%d,%d), (%d,%d,%d): cost = %" PRId64 "\n", lastDebugEdgeCostPoint.x, lastDebugEdgeCostPoint.y, lastDebugEdgeCostPoint.z, bob.x, bob.y, bob.z, getEdgeCost(out, lastDebugEdgeCostPoint, bob, abilities));
             lastDebugEdgeCostPoint = bob;
             a++;
         } else if ( parameters[a] == "now" ) {
diff --git a/plugins/dwarfvet.cpp b/plugins/dwarfvet.cpp
index 19f00e888..2899d4c16 100644
--- a/plugins/dwarfvet.cpp
+++ b/plugins/dwarfvet.cpp
@@ -582,7 +582,7 @@ void tickHandler(color_ostream& out, void* data) {
     /* Now add it to the scratch AHZ */
     for (vector<df::building*>::iterator current_hospital = to_be_added.begin(); current_hospital != to_be_added.end(); current_hospital++) {
         // Add it to the vector
-        out.print("Adding new hospital #id at x1 %d y1: %d z: %d\n",
+        out.print("Adding new hospital #id: %d at x1 %d y1: %d z: %d\n",
                 (*current_hospital)->id,
                 (*current_hospital)->x1,
                 (*current_hospital)->y1,
diff --git a/plugins/follow.cpp b/plugins/follow.cpp
index 21a297bd1..e9733d5da 100644
--- a/plugins/follow.cpp
+++ b/plugins/follow.cpp
@@ -156,7 +156,7 @@ command_result follow (color_ostream &out, std::vector <std::string> & parameter
         ss << "Unpause to begin following " << world->raws.creatures.all[followedUnit->race]->name[0];
         if (followedUnit->name.has_name) ss << " " << followedUnit->name.first_name;
         ss << ". Simply manually move the view to break the following.\n";
-        out.print(ss.str().c_str());
+        out.print("%s", ss.str().c_str());
     }
     else followedUnit = 0;
     is_enabled = (followedUnit != NULL);
diff --git a/plugins/forceequip.cpp b/plugins/forceequip.cpp
index 19c1202d6..ab39bb0d6 100644
--- a/plugins/forceequip.cpp
+++ b/plugins/forceequip.cpp
@@ -298,7 +298,7 @@ static bool moveToInventory(MapExtras::MapCache &mc, df::item *item, df::unit *u
         else
         {
             // The specified body part has not been found, and we've reached the end of the list.  Report failure.
-            if (verbose) { Core::printerr("The specified body part (%s) does not belong to the chosen unit.  Please double-check to ensure that your spelling is correct, and that you have not chosen a dismembered bodypart.\n"); }
+            if (verbose) { Core::printerr("The specified body part (%s) does not belong to the chosen unit.  Please double-check to ensure that your spelling is correct, and that you have not chosen a dismembered bodypart.\n",targetBodyPart->token.c_str()); }
             return false;
         }
 
diff --git a/plugins/fortplan.cpp b/plugins/fortplan.cpp
index a123348d2..5dceb35c9 100644
--- a/plugins/fortplan.cpp
+++ b/plugins/fortplan.cpp
@@ -270,7 +270,7 @@ command_result fortplan(color_ostream &out, vector<string> & params) {
                                             checkCode = layout[checkY][checkX];
                                         }
 
-                                        con.print(" - Code at (%d,%d) is '%s': ",checkX,checkY,checkCode.c_str());
+                                        con.print(" - Code at (%zu,%zu) is '%s': ",checkX,checkY,checkCode.c_str());
                                         auto checkIndex = std::find_if(buildings.begin(), buildings.end(), MatchesCode(checkCode.c_str()));
                                         //if (checkIndex == buildings.end()) {
                                         //    con.print("this is not a valid code, so we keep going.\n");
@@ -331,16 +331,16 @@ command_result fortplan(color_ostream &out, vector<string> & params) {
                                     offsetCursor.y -= yOffset;
                                     DFHack::Gui::setCursorCoords(offsetCursor.x, offsetCursor.y, offsetCursor.z);
                                     if (!buildingInfo.allocate()) {
-                                        con.print("*** There was an error placing building with code '%s' centered at (%d,%d).\n",curCode.c_str(),x,y);
+                                        con.print("*** There was an error placing building with code '%s' centered at (%zu,%zu).\n",curCode.c_str(),x,y);
                                     }
                                     DFHack::Gui::setCursorCoords(cursor.x, cursor.y, cursor.z);
                                 } else if (block) {
                                     //con.print("Placing a building with code '%s' with corner at (%d,%d) and default size %dx%d.\n",curCode.c_str(),x,y,buildingInfo.defaultWidth,buildingInfo.defaultHeight);
                                     if (!buildingInfo.allocate()) {
-                                        con.print("*** There was an error placing building with code '%s' with corner at (%d,%d).\n",curCode.c_str(),x,y);
+                                        con.print("*** There was an error placing building with code '%s' with corner at (%zu,%zu).\n",curCode.c_str(),x,y);
                                     }
                                 } else {
-                                    con.print("*** Found a code '%s' at (%d,%d) for a building with default size %dx%d with an invalid size designation.\n",curCode.c_str(),x,y,buildingInfo.defaultWidth,buildingInfo.defaultHeight);
+                                    con.print("*** Found a code '%s' at (%zu,%zu) for a building with default size %dx%d with an invalid size designation.\n",curCode.c_str(),x,y,buildingInfo.defaultWidth,buildingInfo.defaultHeight);
                                 }
                             } else {
                                 //buildingSize = findBuildingExtent(layout, x, y, -1, -1, out);
@@ -350,7 +350,7 @@ command_result fortplan(color_ostream &out, vector<string> & params) {
                         } else {
                             //con.print("Building a(n) %s.\n",buildingInfo.name.c_str());
                             if (!buildingInfo.allocate()) {
-                                con.print("*** There was an error placing the %s at (%d,%d).\n",buildingInfo.name.c_str(),x,y);
+                                con.print("*** There was an error placing the %s at (%zu,%zu).\n",buildingInfo.name.c_str(),x,y);
                             }
                         }
                     }
diff --git a/plugins/generated-creature-renamer.cpp b/plugins/generated-creature-renamer.cpp
index e70324dd2..625c093cf 100644
--- a/plugins/generated-creature-renamer.cpp
+++ b/plugins/generated-creature-renamer.cpp
@@ -199,11 +199,10 @@ command_result list_creatures(color_ostream &out, std::vector <std::string> & pa
         auto creatureRaw = world->raws.creatures.all[i];
         if (!creatureRaw->flags.is_set(df::enums::creature_raw_flags::GENERATED))
             continue;
-        out.print(creatureRaw->creature_id.c_str());
+        out.print("%s",creatureRaw->creature_id.c_str());
         if (detailed)
         {
-            out.print("\t");
-            out.print(creatureRaw->caste[0]->description.c_str());
+            out.print("\t%s",creatureRaw->caste[0]->description.c_str());
         }
         out.print("\n");
     }
diff --git a/plugins/jobutils.cpp b/plugins/jobutils.cpp
index 3e3b6b2a0..0607b50c5 100644
--- a/plugins/jobutils.cpp
+++ b/plugins/jobutils.cpp
@@ -156,14 +156,14 @@ static command_result job_material_in_job(color_ostream &out, MaterialInfo &new_
 
         if (item_mat != cur_mat)
         {
-            out.printerr("Job item %d has different material: %s\n",
+            out.printerr("Job item %zu has different material: %s\n",
                          i, item_mat.toString().c_str());
             return CR_FAILURE;
         }
 
         if (!new_mat.matches(*item))
         {
-            out.printerr("Job item %d requirements not satisfied by %s.\n",
+            out.printerr("Job item %zu requirements not satisfied by %s.\n",
                          i, new_mat.toString().c_str());
             return CR_FAILURE;
         }
diff --git a/plugins/labormanager/labormanager.cpp b/plugins/labormanager/labormanager.cpp
index 7c749edce..ce206c5bd 100644
--- a/plugins/labormanager/labormanager.cpp
+++ b/plugins/labormanager/labormanager.cpp
@@ -1757,7 +1757,7 @@ public:
         }
 
         if (print_debug)
-            out.print("available count = %d, distinct labors needed = %d\n", available_dwarfs.size(), pq.size());
+            out.print("available count = %zu, distinct labors needed = %zu\n", available_dwarfs.size(), pq.size());
 
         std::map<df::unit_labor, int> to_assign;
 
@@ -1958,7 +1958,7 @@ public:
         /* Assign any leftover dwarfs to "standard" labors */
 
         if (print_debug)
-            out.print("After assignment, %d dwarfs left over\n", available_dwarfs.size());
+            out.print("After assignment, %zu dwarfs left over\n", available_dwarfs.size());
 
         for (auto d = available_dwarfs.begin(); d != available_dwarfs.end(); d++)
         {
diff --git a/plugins/probe.cpp b/plugins/probe.cpp
index 5f4a59ceb..3f39ec994 100644
--- a/plugins/probe.cpp
+++ b/plugins/probe.cpp
@@ -191,7 +191,7 @@ command_result df_probe (color_ostream &out, vector <string> & parameters)
     }
 
     auto &block = *b->getRaw();
-    out.print("block addr: 0x%x\n\n", &block);
+    out.print("block addr: 0x%p\n\n", &block);
 /*
     if (showBlock)
     {
@@ -333,7 +333,7 @@ command_result df_probe (color_ostream &out, vector <string> & parameters)
         out.print("%-16s", "");
         out.print("  %4d", block.local_feature);
         out.print(" (%2d)", local.type);
-        out.print(" addr 0x%X ", local.origin);
+        out.print(" addr 0x%p ", local.origin);
         out.print(" %s\n", sa_feature(local.type));
     }
     PRINT_FLAG( des, feature_global );
@@ -461,7 +461,7 @@ command_result df_bprobe (color_ostream &out, vector <string> & parameters)
         case building_type::NestBox:
             {
                 df::building_nest_boxst* nestbox = (df::building_nest_boxst*) building.origin;
-                out.print(", claimed:(%i), items:%i", nestbox->claimed_by, nestbox->contained_items.size());
+                out.print(", claimed:(%i), items:%zu", nestbox->claimed_by, nestbox->contained_items.size());
                 break;
             }
         default:
diff --git a/plugins/rendermax/renderer_light.cpp b/plugins/rendermax/renderer_light.cpp
index 90c38a06a..3f70d4634 100644
--- a/plugins/rendermax/renderer_light.cpp
+++ b/plugins/rendermax/renderer_light.cpp
@@ -1207,31 +1207,31 @@ void lightingEngineViewscreen::loadSettings()
                 lua_pushlightuserdata(s, this);
                 lua_pushvalue(s,env);
                 Lua::SafeCall(out,s,2,0);
-                out.print("%d materials loaded\n",matDefs.size());
+                out.print("%zu materials loaded\n",matDefs.size());
 
                 lua_pushcfunction(s, parseSpecial);
                 lua_pushlightuserdata(s, this);
                 lua_pushvalue(s,env);
                 Lua::SafeCall(out,s,2,0);
-                out.print("%d day light colors loaded\n",dayColors.size());
+                out.print("%zu day light colors loaded\n",dayColors.size());
 
                 lua_pushcfunction(s, parseBuildings);
                 lua_pushlightuserdata(s, this);
                 lua_pushvalue(s,env);
                 Lua::SafeCall(out,s,2,0);
-                out.print("%d buildings loaded\n",buildingDefs.size());
+                out.print("%zu buildings loaded\n",buildingDefs.size());
 
                 lua_pushcfunction(s, parseCreatures);
                 lua_pushlightuserdata(s, this);
                 lua_pushvalue(s,env);
                 Lua::SafeCall(out,s,2,0);
-                out.print("%d creatures loaded\n",creatureDefs.size());
+                out.print("%zu creatures loaded\n",creatureDefs.size());
 
                 lua_pushcfunction(s, parseItems);
                 lua_pushlightuserdata(s, this);
                 lua_pushvalue(s,env);
                 Lua::SafeCall(out,s,2,0);
-                out.print("%d items loaded\n",itemDefs.size());
+                out.print("%zu items loaded\n",itemDefs.size());
             }
 
         }
diff --git a/plugins/ruby/ruby.cpp b/plugins/ruby/ruby.cpp
index 7133dbed8..240a67cb2 100644
--- a/plugins/ruby/ruby.cpp
+++ b/plugins/ruby/ruby.cpp
@@ -814,7 +814,7 @@ static VALUE rb_dfmemory_pageprotect(VALUE self, VALUE ptr, VALUE len, VALUE pro
         ++prot_p;
     }
 
-    Core::printerr("pageprot %x %x %x\n", rb_num2ulong(ptr), rb_num2ulong(len), prot);
+    Core::printerr("pageprot %zx %zx %x\n", rb_num2ulong(ptr), rb_num2ulong(len), prot);
     ret = Core::getInstance().p->memProtect((void*)rb_num2ulong(ptr), rb_num2ulong(len), prot);
 
     return ret ? Qfalse : Qtrue;
diff --git a/plugins/showmood.cpp b/plugins/showmood.cpp
index 9e3fa7ff7..8f7bb2462 100644
--- a/plugins/showmood.cpp
+++ b/plugins/showmood.cpp
@@ -173,7 +173,7 @@ command_result df_showmood (color_ostream &out, vector <string> & parameters)
         for (size_t i = 0; i < job->job_items.size(); i++)
         {
             df::job_item *item = job->job_items[i];
-            out.print("Item %i: ", i + 1);
+            out.print("Item %zu: ", i + 1);
 
             MaterialInfo matinfo(item->mat_type, item->mat_index);
 
diff --git a/plugins/sort.cpp b/plugins/sort.cpp
index 264da21db..ab2829655 100644
--- a/plugins/sort.cpp
+++ b/plugins/sort.cpp
@@ -147,7 +147,7 @@ bool read_order(color_ostream &out, lua_State *L, std::vector<unsigned> *order,
 
     if (lua_rawlen(L, -1) != size)
     {
-        out.printerr("Invalid ordering size: expected %d, actual %d\n", size, lua_rawlen(L, -1));
+        out.printerr("Invalid ordering size: expected %zu, actual %zu\n", size, lua_rawlen(L, -1));
         return false;
     }
 
diff --git a/plugins/tiletypes.cpp b/plugins/tiletypes.cpp
index 36bde1ac7..74fcbe1b9 100644
--- a/plugins/tiletypes.cpp
+++ b/plugins/tiletypes.cpp
@@ -876,9 +876,9 @@ command_result executePaintJob(color_ostream &out)
     }
 
     if (failures > 0)
-        out.printerr("Could not update %d tiles of %d.\n", failures, all_tiles.size());
+        out.printerr("Could not update %d tiles of %zu.\n", failures, all_tiles.size());
     else
-        out.print("Processed %d tiles.\n", all_tiles.size());
+        out.print("Processed %zu tiles.\n", all_tiles.size());
 
     if (map.WriteAll())
     {
diff --git a/plugins/tubefill.cpp b/plugins/tubefill.cpp
index 1b77d466c..1803ed520 100644
--- a/plugins/tubefill.cpp
+++ b/plugins/tubefill.cpp
@@ -3,6 +3,7 @@
 #include <stdint.h>
 #include <iostream>
 #include <map>
+#include <cinttypes>
 #include <vector>
 #include "Core.h"
 #include "Console.h"
@@ -117,6 +118,6 @@ command_result tubefill(color_ostream &out, std::vector<std::string> & params)
             }
         }
     }
-    out.print("Found and changed %d tiles.\n", count);
+    out.print("Found and changed %" PRId64 " tiles.\n", count);
     return CR_OK;
 }
diff --git a/plugins/workflow.cpp b/plugins/workflow.cpp
index 8396a974e..18490039e 100644
--- a/plugins/workflow.cpp
+++ b/plugins/workflow.cpp
@@ -525,7 +525,7 @@ static void stop_protect(color_ostream &out)
     pending_recover.clear();
 
     if (!known_jobs.empty())
-        out.print("Unprotecting %d jobs.\n", known_jobs.size());
+        out.print("Unprotecting %zd jobs.\n", known_jobs.size());
 
     for (TKnownJobs::iterator it = known_jobs.begin(); it != known_jobs.end(); ++it)
         delete it->second;
@@ -557,7 +557,7 @@ static void start_protect(color_ostream &out)
     check_lost_jobs(out, 0);
 
     if (!known_jobs.empty())
-        out.print("Protecting %d jobs.\n", known_jobs.size());
+        out.print("Protecting %zd jobs.\n", known_jobs.size());
 }
 
 static void init_state(color_ostream &out)