diff --git a/libraries/error.inc.php b/libraries/error.inc.php
index b6df839632..22b7474ee9 100644
--- a/libraries/error.inc.php
+++ b/libraries/error.inc.php
@@ -14,6 +14,7 @@ if (! defined('TESTSUITE')) {
     header('Content-Type: text/html; charset=utf-8');
 }
 
+include_once 'libraries/Response.class.php';
 PMA_Response::getInstance()->disable();
 
 ?>