diff --git a/htdocs/commande/card.php b/htdocs/commande/card.php
index f59038aceae..36f9705aabc 100644
--- a/htdocs/commande/card.php
+++ b/htdocs/commande/card.php
@@ -670,8 +670,8 @@ if (empty($reshook))
 			$tva_tx = '';
 		}
 
-		$qty = GETPOST('qty'.$predef);
-		$remise_percent = (GETPOST('remise_percent'.$predef) != '' ? GETPOST('remise_percent'.$predef) : 0);
+		$qty = price2num(GETPOST('qty'.$predef, 'alpha'));
+		$remise_percent = (GETPOSTISSET('remise_percent'.$predef) ? price2num(GETPOST('remise_percent'.$predef, 'alpha')) : 0);
 
 		// Extrafields
 		$extralabelsline = $extrafields->fetch_name_optionals_label($object->table_element_line);