diff --git a/htdocs/commande/card.php b/htdocs/commande/card.php
index 18d851fb628..031d2c95235 100644
--- a/htdocs/commande/card.php
+++ b/htdocs/commande/card.php
@@ -240,7 +240,7 @@ if (empty($reshook))
 	{
 		$datecommande = dol_mktime(12, 0, 0, GETPOST('remonth'), GETPOST('reday'), GETPOST('reyear'));
 		$datelivraison = dol_mktime(12, 0, 0, GETPOST('liv_month'), GETPOST('liv_day'), GETPOST('liv_year'));
-        $selectedLines = GETPOST('toselect');
+        $selectedLines = GETPOST('toselect', 'array');
 
 		if ($datecommande == '') {
 			setEventMessages($langs->trans('ErrorFieldRequired', $langs->transnoentities('Date')), null, 'errors');