diff --git a/htdocs/fourn/commande/card.php b/htdocs/fourn/commande/card.php
index a7568f446ca..0e23b62fbb0 100644
--- a/htdocs/fourn/commande/card.php
+++ b/htdocs/fourn/commande/card.php
@@ -561,6 +561,7 @@ if (empty($reshook))
 	        	if (!$res) dol_print_error($db);
 		}
 		
+		$productsupplier = new ProductFournisseur($db);
 		if ($productsupplier->get_buyprice(0, price2num($_POST['qty']), $line->fk_product, 'none', GETPOST('socid','int')) < 0 )
 		{
 			setEventMessages($langs->trans("ErrorQtyTooLowForThisSupplier"), null, 'warnings');