diff --git a/htdocs/compta/paiement.php b/htdocs/compta/paiement.php
index 12a6eb97d13..9c99fab4657 100644
--- a/htdocs/compta/paiement.php
+++ b/htdocs/compta/paiement.php
@@ -8,7 +8,7 @@
  * Copyright (C) 2014       Raphaël Doursenaud      <rdoursenaud@gpcsolutions.fr>
  * Copyright (C) 2014       Teddy Andreotti         <125155@supinfo.com>
  * Copyright (C) 2015       Juanjo Menent           <jmenent@2byte.es>
- * Copyright (C) 2018-2019  Frédéric France         <frederic.france@netlogic.fr>
+ * Copyright (C) 2018-2021  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
@@ -465,7 +465,7 @@ if ($action == 'create' || $action == 'confirm_paiement' || $action == 'add_paie
 
 		// Date payment
 		print '<tr><td><span class="fieldrequired">'.$langs->trans('Date').'</span></td><td>';
-		$datepayment = dol_mktime(12, 0, 0, $_POST['remonth'], $_POST['reday'], $_POST['reyear']);
+		$datepayment = dol_mktime(12, 0, 0, GETPOST('remonth', 'int'), GETPOST('reday', 'int'), GETPOST('reyear', 'int'));
 		$datepayment = ($datepayment == '' ? (empty($conf->global->MAIN_AUTOFILL_DATE) ?-1 : '') : $datepayment);
 		print $form->selectDate($datepayment, '', '', '', 0, "add_paiement", 1, 1, 0, '', '', $facture->date);
 		print '</td></tr>';