diff --git a/inc/drivers_ldap.php b/inc/drivers_ldap.php
index 6e8c8089..eec356e2 100644
--- a/inc/drivers_ldap.php
+++ b/inc/drivers_ldap.php
@@ -476,13 +476,19 @@ function sync_LDAP_groups(){
   }
 
   $ldap_groups = array_keys($ldap_groups_info);
+
   // users only in ldap
   $groups_to_create = array_diff($ldap_groups,$db_groups);
+
   // users only in db
   $groups_to_deactivate = array_diff($db_groups,$ldap_groups);
+
   // users present in ldap and in the db
   $groups_to_update = array_intersect($db_groups,$ldap_groups);
 
+  // groups where nothing was done
+  $groups_nothing_done[] = null;
+
   if ( sizeof ( $groups_to_create ) ){
     $validUserFields = awl_get_fields('usr');
     foreach ( $groups_to_create as $k => $group ){