diff --git a/message/discussion.php b/message/discussion.php
index 32a1f4645e4..10500d86ccf 100644
--- a/message/discussion.php
+++ b/message/discussion.php
@@ -24,8 +24,8 @@
  * @package message
  */
 
-    require('../config.php');
-    require('lib.php');
+    require(dirname(dirname(__FILE__)) . '/config.php');
+    require_once(dirname(__FILE__) . '/lib.php');
 
     //the same URL params as in 1.9
     $userid     = required_param('id', PARAM_INT);