diff --git a/library/Core.cpp b/library/Core.cpp
index b8a5f4808..2459559dd 100644
--- a/library/Core.cpp
+++ b/library/Core.cpp
@@ -259,7 +259,7 @@ static void listScripts(PluginManager *plug_mgr, std::map<string,string> &pset,
 
             pset[prefix + files[i].substr(0, files[i].size()-4)] = help;
         }
-        else if (plug_mgr->eval_ruby && hasEnding(files[i], ".rb"))
+        else if (plug_mgr->ruby && plug_mgr->ruby->is_enabled() && hasEnding(files[i], ".rb"))
         {
             std::string help = getScriptHelp(path + files[i], "# ");
 
@@ -312,6 +312,9 @@ static command_result runLuaScript(color_ostream &out, std::string name, vector<
 
 static command_result runRubyScript(color_ostream &out, PluginManager *plug_mgr, std::string name, vector<string> &args)
 {
+    if (!plug_mgr->ruby || !plug_mgr->ruby->is_enabled())
+        return CR_FAILURE;
+
     std::string rbcmd = "$script_args = [";
     for (size_t i = 0; i < args.size(); i++)
         rbcmd += "'" + args[i] + "', ";
@@ -319,7 +322,7 @@ static command_result runRubyScript(color_ostream &out, PluginManager *plug_mgr,
 
     rbcmd += "catch(:script_finished) { load './hack/scripts/" + name + ".rb' }";
 
-    return plug_mgr->eval_ruby(out, rbcmd.c_str());
+    return plug_mgr->ruby->eval_ruby(out, rbcmd.c_str());
 }
 
 command_result Core::runCommand(color_ostream &out, const std::string &command)
@@ -450,7 +453,7 @@ command_result Core::runCommand(color_ostream &con, const std::string &first, ve
                     con.print("%s: %s\n", parts[0].c_str(), help.c_str());
                     return CR_OK;
                 }
-                if (plug_mgr->eval_ruby && fileExists(filename + ".rb"))
+                if (plug_mgr->ruby && plug_mgr->ruby->is_enabled() && fileExists(filename + ".rb"))
                 {
                     string help = getScriptHelp(filename + ".rb", "# ");
                     con.print("%s: %s\n", parts[0].c_str(), help.c_str());
@@ -767,7 +770,7 @@ command_result Core::runCommand(color_ostream &con, const std::string &first, ve
 
                 if (fileExists(filename + ".lua"))
                     res = runLuaScript(con, first, parts);
-                else if (plug_mgr->eval_ruby && fileExists(filename + ".rb"))
+                else if (plug_mgr->ruby && plug_mgr->ruby->is_enabled() && fileExists(filename + ".rb"))
                     res = runRubyScript(con, plug_mgr, first, parts);
                 else if (try_autocomplete(con, first, completed))
                     return CR_NOT_IMPLEMENTED;// runCommand(con, completed, parts);
diff --git a/library/PluginManager.cpp b/library/PluginManager.cpp
index 3ef4910cb..28d57c76f 100644
--- a/library/PluginManager.cpp
+++ b/library/PluginManager.cpp
@@ -679,7 +679,7 @@ void Plugin::push_function(lua_State *state, LuaFunction *fn)
 PluginManager::PluginManager(Core * core)
 {
     cmdlist_mutex = new mutex();
-    eval_ruby = NULL;
+    ruby = NULL;
 }
 
 PluginManager::~PluginManager()
@@ -774,7 +774,7 @@ void PluginManager::registerCommands( Plugin * p )
         belongs[cmds[i].name] = p;
     }
     if (p->plugin_eval_ruby)
-        eval_ruby = p->plugin_eval_ruby;
+        ruby = p;
     cmdlist_mutex->unlock();
 }
 
@@ -788,6 +788,6 @@ void PluginManager::unregisterCommands( Plugin * p )
         belongs.erase(cmds[i].name);
     }
     if (p->plugin_eval_ruby)
-        eval_ruby = NULL;
+        ruby = NULL;
     cmdlist_mutex->unlock();
 }
diff --git a/library/include/PluginManager.h b/library/include/PluginManager.h
index 506ca33c0..b47863d48 100644
--- a/library/include/PluginManager.h
+++ b/library/include/PluginManager.h
@@ -170,6 +170,12 @@ namespace DFHack
 
         void open_lua(lua_State *state, int table);
 
+        command_result eval_ruby(color_ostream &out, const char* cmd) {
+            if (!plugin_eval_ruby || !is_enabled())
+                return CR_FAILURE;
+            return plugin_eval_ruby(out, cmd);
+        }
+
     private:
         RefLock * access;
         std::vector <PluginCommand> commands;
@@ -236,7 +242,7 @@ namespace DFHack
         {
             return all_plugins.size();
         }
-        command_result (*eval_ruby)(color_ostream &, const char*);
+        Plugin *ruby;
     // DATA
     private:
         tthread::mutex * cmdlist_mutex;