diff --git a/htdocs/fourn/paiement/list.php b/htdocs/fourn/paiement/list.php
index 1bf8984a6ee..f61d1795cba 100644
--- a/htdocs/fourn/paiement/list.php
+++ b/htdocs/fourn/paiement/list.php
@@ -11,6 +11,7 @@
  * Copyright (C) 2017		Alexandre Spangaro		<aspangaro@open-dsi.fr>
  * Copyright (C) 2018		Frédéric France			<frederic.france@netlogic.fr>
  * Copyright (C) 2020		Tobias Sekan			<tobias.sekan@startmail.com>
+ * Copyright (C) 2021		Ferran Marcet			<fmarcet@2byte.es>
  *
  * 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
@@ -171,7 +172,7 @@ if ($search_company)			$sql .= natural_search('s.nom', $search_company);
 if ($search_payment_type != '')	$sql .= " AND c.code='".$db->escape($search_payment_type)."'";
 if ($search_cheque_num != '')	$sql .= natural_search('p.num_paiement', $search_cheque_num);
 if ($search_amount)				$sql .= natural_search('p.amount', $search_amount, 1);
-if ($search_bank_account > 0)	$sql .= ' AND b.fk_account='.$search_bank_account."'";
+if ($search_bank_account > 0)	$sql .= ' AND b.fk_account='.((int) $search_bank_account);
 
 if ($search_all) $sql .= natural_search(array_keys($fieldstosearchall), $search_all);