diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index 802457694f2..7b81e631213 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -792,7 +792,7 @@ class SaleOrderLine(models.Model):
                 lang=self.order_id.partner_id.lang,
                 partner=self.order_id.partner_id.id,
                 quantity=self.product_uom_qty,
-                date_order=self.order_id.date_order,
+                date=self.order_id.date_order,
                 pricelist=self.order_id.pricelist_id.id,
                 uom=self.product_uom.id,
                 fiscal_position=self.env.context.get('fiscal_position')