diff --git a/src/script/squirrel_class.hpp b/src/script/squirrel_class.hpp
--- a/src/script/squirrel_class.hpp
+++ b/src/script/squirrel_class.hpp
@@ -18,7 +18,7 @@
  * The template to define classes in Squirrel. It takes care of the creation
  *  and calling of such classes, to minimize the API layer.
  */
-template <class CL>
+template <class CL, ScriptType ST>
 class DefSQClass {
 private:
 	const char *classname;
@@ -35,7 +35,7 @@ public:
 	void DefSQMethod(Squirrel *engine, Func function_proc, const char *function_name)
 	{
 		using namespace SQConvert;
-		engine->AddMethod(function_name, DefSQNonStaticCallback<CL, Func>, 0, NULL, &function_proc, sizeof(function_proc));
+		engine->AddMethod(function_name, DefSQNonStaticCallback<CL, Func, ST>, 0, NULL, &function_proc, sizeof(function_proc));
 	}
 
 	/**
@@ -45,7 +45,7 @@ public:
 	void DefSQAdvancedMethod(Squirrel *engine, Func function_proc, const char *function_name)
 	{
 		using namespace SQConvert;
-		engine->AddMethod(function_name, DefSQAdvancedNonStaticCallback<CL, Func>, 0, NULL, &function_proc, sizeof(function_proc));
+		engine->AddMethod(function_name, DefSQAdvancedNonStaticCallback<CL, Func, ST>, 0, NULL, &function_proc, sizeof(function_proc));
 	}
 
 	/**
@@ -58,7 +58,7 @@ public:
 	void DefSQMethod(Squirrel *engine, Func function_proc, const char *function_name, int nparam, const char *params)
 	{
 		using namespace SQConvert;
-		engine->AddMethod(function_name, DefSQNonStaticCallback<CL, Func>, nparam, params, &function_proc, sizeof(function_proc));
+		engine->AddMethod(function_name, DefSQNonStaticCallback<CL, Func, ST>, nparam, params, &function_proc, sizeof(function_proc));
 	}
 
 	/**