diff --git a/bureau/class/m_piwik.php b/bureau/class/m_piwik.php
index 8fcb0224..684b35cb 100644
--- a/bureau/class/m_piwik.php
+++ b/bureau/class/m_piwik.php
@@ -33,6 +33,8 @@ class m_piwik {
 
   function hook_menu() {
     global $quota;
+    if ( empty($this->piwik_server_uri) || empty($this->piwik_admin_token)) return false;
+
     $obj = array(
       'title'       => _("Piwik statistics"),
       'ico'         => 'images/stat.png',