1 files changed, 3 insertions, 0 deletions
diff --git a/engine.h b/engine.h
index f8bdbe0ee..4fbb3aa33 100644
--- a/engine.h
+++ b/engine.h
@@ -276,4 +276,7 @@ static inline const RoadVehicleInfo* RoadVehInfo(EngineID e)
 	return &_road_vehicle_info[e - ROAD_ENGINES_INDEX];
 }
 
+void UnloadWagonOverrides(void);
+void UnloadCustomEngineSprites(void);
+
 #endif /* ENGINE_H */