diff --git a/apps/user_ldap/lib/wizard.php b/apps/user_ldap/lib/wizard.php
index 0139393c49b7630278c6d81c5d7feb1c1f2ef62d..eb2a1ab02defc950ad9083d1573d556c92e6dc9f 100644
--- a/apps/user_ldap/lib/wizard.php
+++ b/apps/user_ldap/lib/wizard.php
@@ -301,6 +301,7 @@ class Wizard extends LDAPUtility {
 		$filter = $ldapAccess->combineFilterWithOr($filterParts);
 		$filter = $ldapAccess->combineFilterWithAnd(array($filter, 'cn=*'));
 
+		$groupNames = array();
 		$groupEntries = array();
 		$limit = 400;
 		$offset = 0;