diff --git a/application/modules/auth/models/GroupModel.php b/application/modules/auth/models/GroupModel.php
index 0470412bf5aeb947337d40f98c4c37452d05c198..0d9eafb1d05691b26fcd674cc9dba24912314797 100644
--- a/application/modules/auth/models/GroupModel.php
+++ b/application/modules/auth/models/GroupModel.php
@@ -225,7 +225,7 @@ class Auth_GroupModel extends Unl_Model
             }
             $select->where('parentGroup IN(?)', $group->getId());
         } else {
-            $select->where('parentGroup = ?', $group->getId());
+            $select->where($db->quoteInto('parentGroup = ?', $group->getId()));
         }
         
         $records = $select->query()->fetchAll();