diff --git a/admin_customers.php b/admin_customers.php
index a7cfca87..4e4c931d 100644
--- a/admin_customers.php
+++ b/admin_customers.php
@@ -196,7 +196,7 @@ if($page == 'customers'
 
 				// Delete all waiting "create user" -tasks for this user, #276
 				// Note: the WHERE selects part of a serialized array, but it should be safe this way
-				$db->query("DELETE FROM `" . TABLE_PANEL_TASKS . "` WHERE `type` = '2' AND `data` LIKE '%;\"" . $db->escape($result['loginname']) . "\"%;';");
+				$db->query("DELETE FROM `" . TABLE_PANEL_TASKS . "` WHERE `type` = '2' AND `data` LIKE '%:\"" . $db->escape($result['loginname']) . "\";%';");
 
 				// remove everything APS-related, #216
 				$apsresult = $db->query("SELECT `ID` FROM `".TABLE_APS_INSTANCES."` WHERE `CustomerID`='".(int)$id."'");