diff --git a/db/update17.1.sql b/db/update17.1.sql
index 5463878c98..02ef5942d5 100644
--- a/db/update17.1.sql
+++ b/db/update17.1.sql
@@ -16,3 +16,5 @@ CREATE TABLE `zt_projectadmin` (
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
 ALTER TABLE `zt_kanban` ADD `showWIP` enum('0','1') NOT NULL DEFAULT '1' AFTER `displayCards`;
 ALTER TABLE `zt_kanban` ADD `alignment` varchar(10) NOT NULL DEFAULT 'center' AFTER `object`;
+
+ALTER TABLE `zt_workflow` ADD `approval` enum('enabled', 'disabled') NOT NULL DEFAULT 'disabled' AFTER `status`;