diff --git a/htdocs/fourn/facture/card.php b/htdocs/fourn/facture/card.php
index 761e1bb9577..d1e7a2c668c 100644
--- a/htdocs/fourn/facture/card.php
+++ b/htdocs/fourn/facture/card.php
@@ -9,7 +9,7 @@
  * Copyright (C) 2013		Florian Henry			<florian.henry@open-concept.pro>
  * Copyright (C) 2014-2016  Marcos García			<marcosgdf@gmail.com>
  * Copyright (C) 2016-2020	Alexandre Spangaro		<aspangaro@open-dsi.fr>
- * Copyright (C) 2018       Frédéric France         <frederic.france@netlogic.fr>
+ * Copyright (C) 2018-2021  Frédéric France         <frederic.france@netlogic.fr>
  * Copyright (C) 2019       Ferran Marcet	        <fmarcet@2byte.es>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -41,6 +41,7 @@ require_once DOL_DOCUMENT_ROOT.'/fourn/class/paiementfourn.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/discount.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/fourn.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
+require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/doleditor.class.php';
 if (!empty($conf->product->enabled)) {
 	require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';