diff --git a/src/mysql.h b/src/mysql.h
index 197d327..4ca50a6 100644
--- a/src/mysql.h
+++ b/src/mysql.h
@@ -218,7 +218,7 @@ namespace module
 
 		static void regist(sol::state* lua);
 		// 通过 imodule 继承
-		virtual void regist_global(const char* name, sol::state* lua);
+		virtual void regist_global(const char* name, sol::state* lua){}
 		virtual void delete_global() { delete this; }
 		virtual void self_free();
 	private: