diff --git a/db/update16.4.sql b/db/update16.4.sql
index 106d70915b..3bea7756a8 100644
--- a/db/update16.4.sql
+++ b/db/update16.4.sql
@@ -1,4 +1,4 @@
-ALTER TABLE `zt_userquery` MODIFY COLUMN `common` enum('0','1') NOT NULL DEFAULT '0';
+ALTER TABLE `zt_userquery` ADD `common` enum('0','1') NOT NULL DEFAULT '0';
 
 ALTER TABLE `zt_project` ADD `vision` varchar(10) NOT NULL DEFAULT 'rnd' AFTER `order`;
 ALTER TABLE `zt_product` ADD `vision` varchar(10) NOT NULL DEFAULT 'rnd' AFTER `order`;
@@ -20,4 +20,4 @@ ALTER TABLE `zt_effort` ADD `vision` varchar(10) NOT NULL DEFAULT 'rnd' AFTER `i
 ALTER TABLE `zt_story` ADD `vision` varchar(10) NOT NULL DEFAULT 'rnd' AFTER `id`;
 
 ALTER TABLE `zt_user` ADD `visions` varchar(20) NOT NULL AFTER `visits`;
-UPDATE `zt_user` SET `visions`='rnd,lite';
\ No newline at end of file
+UPDATE `zt_user` SET `visions`='rnd,lite';