diff --git a/inc/drivers_ldap.php b/inc/drivers_ldap.php
index b855fe21..f0c34e14 100644
--- a/inc/drivers_ldap.php
+++ b/inc/drivers_ldap.php
@@ -663,7 +663,8 @@ function sync_LDAP_groups(){
           && isset($user_mapping['username'])) {
         $query = $ldapDriver->ldap_query_one;
         $username_ldap_attribute = $user_mapping['username'];
-        $filter = "(objectCategory=person)";
+
+        $filter = $ldapDriver->filterUsers();
 
         $ldap_members_tmp = array();