diff --git a/htdocs/commande/card.php b/htdocs/commande/card.php
index 66e673abf2d..e467a398dc7 100644
--- a/htdocs/commande/card.php
+++ b/htdocs/commande/card.php
@@ -1106,7 +1106,7 @@ if (empty($reshook)) {
 			$special_code = 3;
 		}
 
-		$remise_percent = price2num(GETPOST('remise_percent'), '', 2);
+		$remise_percent = GETPOST('remise_percent') != '' ? price2num(GETPOST('remise_percent'), '', 2) : 0;
 
 		// Check minimum price
 		$productid = GETPOST('productid', 'int');