diff --git a/html/logout.php b/html/logout.php
index 0b65167d6..45637d6e4 100644
--- a/html/logout.php
+++ b/html/logout.php
@@ -23,10 +23,10 @@
 require_once '../include/constant.php';
 require_once ("lib/ac_common.php");
 require_once('lib/class_database.php');
+session_unset();
 
 html_page_start("classic");
 
-session_unset();
 /* clean Global variable */
 
 if ( isset ($g_user) ) unset ($GLOBAL['g_user']);
@@ -39,8 +39,8 @@ if (isset($_SERVER['HTTP_COOKIE'])) {
     foreach($cookies as $cookie) {
         $parts = explode('=', $cookie);
         $name = trim($parts[0]);
-        setcookie($name, '', time()-1000);
-        setcookie($name, '', time()-1000, '/');
+        @setcookie($name, '', time()-1000);
+        @setcookie($name, '', time()-1000, '/');
     }
 }
 echo '<h2 class="info">'._('Vous êtes déconnecté').'</h2>';