diff --git a/htdocs/product/price.php b/htdocs/product/price.php
index 93474b16554..70e09114669 100644
--- a/htdocs/product/price.php
+++ b/htdocs/product/price.php
@@ -1443,7 +1443,7 @@ if ((empty($conf->global->PRODUIT_CUSTOMER_PRICES) || $action=='showlog_default_
     		// On l'ajoute donc pour remettre a niveau (pb vieilles versions)
     		//$object->updatePrice($object->price, $object->price_base_type, $user, $newprice_min);
             if (! empty($conf->global->PRODUIT_MULTIPRICES)) {
-                $object->updatePrice($object->multiprices[1], $object->multiprices_base_type[1], $user, $object->multiprices_tva_tx[1], $object->multiprices_min[1], 1);
+            	$object->updatePrice($object->multiprices[1], $object->multiprices_base_type[1], $user, (empty($object->multiprices_tva_tx[1])?0:$object->multiprices_tva_tx[1]), $object->multiprices_min[1], 1);
             } else {
                 $object->updatePrice($object->price, $object->price_base_type, $user, $object->tva_tx, $object->price_min);
             }