diff --git a/library/include/RemoteServer.h b/library/include/RemoteServer.h
index d89b44959..7a6940bbe 100644
--- a/library/include/RemoteServer.h
+++ b/library/include/RemoteServer.h
@@ -65,6 +65,7 @@ namespace  DFHack
                            RPCService *owner, const char *name, int flags)
             : RPCFunctionBase(in, out), name(name), flags(flags), owner(owner), id(-1)
         {}
+        virtual ~ServerFunctionBase() {}
 
         RPCService *owner;
         int16_t id;
diff --git a/library/modules/Maps.cpp b/library/modules/Maps.cpp
index f1f40f19c..608068b8e 100644
--- a/library/modules/Maps.cpp
+++ b/library/modules/Maps.cpp
@@ -585,7 +585,7 @@ bool MapExtras::Block::Allocate()
     if (!block)
         return false;
 
-    delete item_counts;
+    delete[] item_counts;
     delete tiles;
     delete basemats;
     init();
diff --git a/library/modules/Screen.cpp b/library/modules/Screen.cpp
index 8057d17a2..e9d19c931 100644
--- a/library/modules/Screen.cpp
+++ b/library/modules/Screen.cpp
@@ -195,7 +195,7 @@ bool Screen::drawBorder(const std::string &title)
     if (!gps) return false;
 
     int dimx = gps->dimx, dimy = gps->dimy;
-    Pen border(0xDB, 8);
+    Pen border('\xDB', 8);
     Pen text(0, 0, 7);
     Pen signature(0, 0, 8);