diff --git a/src/localstorage.h b/src/localstorage.h
index f44aeee..9b5f60a 100644
--- a/src/localstorage.h
+++ b/src/localstorage.h
@@ -22,6 +22,7 @@ namespace module
 		// 通过 imodule 继承
 		virtual void regist_global(const char* name, sol::state* lua);
 		virtual void delete_global() { delete this; }
+		virtual void self_free() {}
 	};
 }