diff --git a/cron/centAcl.php b/cron/centAcl.php
index 098f3d80723f65f408093124fd0d2ea0b8ea0cad..864a69714e1e7ef19e43c1ee2851a418dceb33f8 100644
--- a/cron/centAcl.php
+++ b/cron/centAcl.php
@@ -222,8 +222,7 @@ try {
      */
 
     $tabGroups = array();
-    $groupStr = "";
-    $query = "SELECT DISTINCT acl_groups.acl_group_id, acl_resources.acl_res_id " .
+    $query = "SELECT DISTINCT acl_groups.acl_group_id " .
         "FROM acl_res_group_relations, `acl_groups`, `acl_resources` " .
         "WHERE acl_groups.acl_group_id = acl_res_group_relations.acl_group_id " .
         "AND acl_res_group_relations.acl_res_id = acl_resources.acl_res_id " .
@@ -233,11 +232,7 @@ try {
 
     $DBRESULT1 = $pearDB->query($query);
     while ($result = $DBRESULT1->fetchRow()) {
-        $tabGroups[$result["acl_group_id"]] = 1;
-        if ($groupStr != '') {
-            $groupStr .= ",";
-        }
-        $groupStr = $result["acl_group_id"];
+        $tabGroups[$result['acl_group_id']] = 1;
     }
     $DBRESULT1->closeCursor();
     unset($result);