diff --git a/src/tencent_sdk_tmt.h b/src/tencent_sdk_tmt.h
index 851fce9..844116a 100644
--- a/src/tencent_sdk_tmt.h
+++ b/src/tencent_sdk_tmt.h
@@ -30,6 +30,7 @@ namespace module
 	private:
 		virtual void regist_global(const char* name, sol::state* lua);
 		virtual void delete_global() { delete this; }
+		virtual void self_free() {}
 	};
 }