diff --git a/inc/Ldap.class.php b/inc/Ldap.class.php
index c901ede7..57ec0ec3 100644
--- a/inc/Ldap.class.php
+++ b/inc/Ldap.class.php
@@ -186,7 +186,13 @@ class Ldap
         $log = new Log(__FUNCTION__);
 
         $groupDN = (!empty(self::$_ldapGroup)) ? self::searchGroupDN() : '*';
-        $filter = '(&(|(memberOf=' . $groupDN . ')(groupMembership=' . $groupDN . ')(memberof:1.2.840.113556.1.4.1941:=' . $groupDN . '))(|(objectClass=inetOrgPerson)(objectClass=person)(objectClass=simpleSecurityObject)))';
+
+        if (self::$_ADS === true) {
+            $filter = '(&(|(memberOf=' . $groupDN . ')(groupMembership=' . $groupDN . ')(memberof:1.2.840.113556.1.4.1941:=' . $groupDN . '))(|(objectClass=inetOrgPerson)(objectClass=person)(objectClass=simpleSecurityObject)))';
+        } else {
+            $filter = '(&(|(memberOf=' . $groupDN . ')(groupMembership=' . $groupDN . '))(|(objectClass=inetOrgPerson)(objectClass=person)(objectClass=simpleSecurityObject)))';
+        }
+
         $filterAttr = array('dn');
 
         $searchRes = @ldap_search(self::$_ldapConn, self::$_searchBase, $filter, $filterAttr);