diff --git a/htdocs/cron/list.php b/htdocs/cron/list.php
index 5017a0af24d..a9d688be1d5 100644
--- a/htdocs/cron/list.php
+++ b/htdocs/cron/list.php
@@ -2,6 +2,7 @@
 /* Copyright (C) 2012      Nicolas Villa aka Boyquotes http://informetic.fr
  * Copyright (C) 2013      Florian Henry       <florian.henry@open-concept.pro>
  * Copyright (C) 2013-2016 Laurent Destailleur <eldy@users.sourceforge.net>
+ * Copyright (C) 2019       Frédéric France         <frederic.france@netlogic.fr>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,6 +29,7 @@ require '../main.inc.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/cron/class/cronjob.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/cron.lib.php';
+require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
 
 // Load translation files required by the page
 $langs->loadLangs(array("admin","cron","bills","members"));