diff --git a/admin/cron.php b/admin/cron.php
index 71c96f1ac85..3b3d74b4e77 100644
--- a/admin/cron.php
+++ b/admin/cron.php
@@ -26,7 +26,7 @@
         chdir(dirname($_SERVER['argv'][0]));
     }
 
-    require_once("../config.php");
+    require_once(dirname(__FILE__) . '/../config.php');
     require_once($CFG->dirroot.'/lib/adminlib.php');
 
     if (!$alreadyadmin = isadmin()) {