3 files changed, 16 insertions, 0 deletions
diff --git a/src/ai/ai_instance.cpp b/src/ai/ai_instance.cpp
index 07b86b241..cfd952505 100644
--- a/src/ai/ai_instance.cpp
+++ b/src/ai/ai_instance.cpp
@@ -24,6 +24,8 @@
 #include "ai_storage.hpp"
 #include "ai_instance.hpp"
 
+#define DEFINE_SCRIPT_FILES
+
 /* Convert all AI related classes to Squirrel data.
  * Note: this line a marker in squirrel_export.sh. Do not change! */
 #include "api/ai_abstractlist.hpp.sq"
@@ -73,6 +75,8 @@
 #include "api/ai_vehicle.hpp.sq"
 #include "api/ai_vehiclelist.hpp.sq"
 
+#undef DEFINE_SCRIPT_FILES
+
 /* static */ AIInstance *AIInstance::current_instance = NULL;
 
 AIStorage::~AIStorage()
diff --git a/src/ai/api/ai_map.hpp b/src/ai/api/ai_map.hpp
index 9c544ea25..dbf3db08f 100644
--- a/src/ai/api/ai_map.hpp
+++ b/src/ai/api/ai_map.hpp
@@ -12,6 +12,12 @@
  */
 class AIMap : public AIObject {
 public:
+#ifdef DEFINE_SCRIPT_FILES
+	enum MapType {
+		TILE_INVALID = INVALID_TILE, //!< An invalid tile for every function.
+	};
+#endif /* DEFINE_SCRIPT_FILES */
+
 	static const char *GetClassName() { return "AIMap"; }
 
 	/**
diff --git a/src/ai/api/ai_map.hpp.sq b/src/ai/api/ai_map.hpp.sq
index f65368c8f..7419d17ba 100644
--- a/src/ai/api/ai_map.hpp.sq
+++ b/src/ai/api/ai_map.hpp.sq
@@ -4,6 +4,10 @@
 #include "ai_map.hpp"
 
 namespace SQConvert {
+	/* Allow enums to be used as Squirrel parameters */
+	template <> AIMap::MapType GetParam(ForceType<AIMap::MapType>, HSQUIRRELVM vm, int index, SQAutoFreePointers *ptr) { SQInteger tmp; sq_getinteger(vm, index, &tmp); return (AIMap::MapType)tmp; }
+	template <> int Return<AIMap::MapType>(HSQUIRRELVM vm, AIMap::MapType res) { sq_pushinteger(vm, (int32)res); return 1; }
+
 	/* Allow AIMap to be used as Squirrel parameter */
 	template <> AIMap *GetParam(ForceType<AIMap *>, HSQUIRRELVM vm, int index, SQAutoFreePointers *ptr) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, 0); return  (AIMap *)instance; }
 	template <> AIMap &GetParam(ForceType<AIMap &>, HSQUIRRELVM vm, int index, SQAutoFreePointers *ptr) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, 0); return *(AIMap *)instance; }
@@ -17,6 +21,8 @@ void SQAIMap_Register(Squirrel *engine) {
 	SQAIMap.PreRegister(engine);
 	SQAIMap.AddConstructor<void (AIMap::*)(), 1>(engine, "x");
 
+	SQAIMap.DefSQConst(engine, AIMap::TILE_INVALID, "TILE_INVALID");
+
 	SQAIMap.DefSQStaticMethod(engine, &AIMap::GetClassName,      "GetClassName",      1, "x");
 	SQAIMap.DefSQStaticMethod(engine, &AIMap::IsValidTile,       "IsValidTile",       2, "xi");
 	SQAIMap.DefSQStaticMethod(engine, &AIMap::GetMapSize,        "GetMapSize",        1, "x");