diff --git a/ag/include/usergroup.inc.php b/ag/include/usergroup.inc.php
index 601ceae..949a241 100644
--- a/ag/include/usergroup.inc.php
+++ b/ag/include/usergroup.inc.php
@@ -39,8 +39,10 @@ function getUserGroups($user) {
 	}
 
 	$i = 0;
-	while ($result = mysql_fetch_assoc($qry)) {
-		$groups[] = array("gruppen_id" => $result['gruppen_id'], "gruppen_name" => $result['gruppen_name']);
+	if($qry) {
+		while ($result = mysql_fetch_assoc($qry)) {
+			$groups[] = array("gruppen_id" => $result['gruppen_id'], "gruppen_name" => $result['gruppen_name']);
+		}
 	}
 
 	return $groups;