diff --git a/admin-dev/index.php b/admin-dev/index.php
index 5027bc2e8..6f3e4b4aa 100644
--- a/admin-dev/index.php
+++ b/admin-dev/index.php
@@ -27,5 +27,6 @@
 
 define('_PS_ADMIN_DIR_', getcwd());
 require(dirname(__FILE__).'/../config/config.inc.php');
+require(dirname(__FILE__).'/functions.php');
 Dispatcher::getInstance()->dispatch();