diff --git a/html/do.php b/html/do.php
index b75a754d8..f2775eec5 100644
--- a/html/do.php
+++ b/html/do.php
@@ -34,6 +34,7 @@ require_once NOALYSS_INCLUDE.'/lib/html_input.class.php';
 require_once NOALYSS_INCLUDE.'/lib/http_input.class.php';
 require_once NOALYSS_INCLUDE.'/lib/icon_action.class.php';
 $http=new HttpInput();
+
 mb_internal_encoding("UTF-8");
 // if gDossier is not set redirect to form to choose a folder
 if ( ! isset($_REQUEST['gDossier']))
@@ -41,7 +42,7 @@ if ( ! isset($_REQUEST['gDossier']))
     redirect('user_login.php');
     exit();
 }
-if ( ! isset ($_SESSION[SESSION_KEY.'g_theme']))
+if ( ! isset ($_SESSION[SESSION_KEY.'g_user']))
   {
     echo "<h2>"._('Vous  êtes déconnecté')."</h2>";
     $backurl=$_SERVER['REQUEST_URI'];