diff --git a/src/redis.h b/src/redis.h
index 8dd1f2a..0fc1e0f 100644
--- a/src/redis.h
+++ b/src/redis.h
@@ -45,6 +45,7 @@ namespace module
 
 		virtual void regist_global(const char* name, sol::state* lua) override;
 		virtual void delete_global() { delete this; }
+		virtual void self_free() {}
 
 
 		friend class module::redis;