diff --git a/app/admin/powerDNS/refresh-ptr-records.php b/app/admin/powerDNS/refresh-ptr-records.php
index df81df0283f17ada62904fc51f5e6f6d3825835a..49c8469de33472330ae39c3390c9b47069a9b2ab 100644
--- a/app/admin/powerDNS/refresh-ptr-records.php
+++ b/app/admin/powerDNS/refresh-ptr-records.php
@@ -1,3 +1,7 @@
+<?php
+/* functions */
+require_once( dirname(__FILE__) . '/../../../functions/functions.php' );
+?>
 <!-- header -->
 <div class="pHeader"><?php print _("PTR zone refresh records"); ?></div>