diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index 549c0edbd57..09256593b5c 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -1212,7 +1212,7 @@ class sale_order_line(osv.osv):
                 warning_msgs += _("No valid pricelist line found ! :") + warn_msg +"\n\n"
             else:
                 if update_tax:
-                    price = self.pool['account.tax']._fix_tax_included_price(cr, uid, price, product_obj.taxes_id, result['tax_id'])
+                    price = self.pool['account.tax']._fix_tax_included_price(cr, uid, price, taxes, result['tax_id'])
                 result.update({'price_unit': price})
                 if context.get('uom_qty_change', False):
                     values = {'price_unit': price}