diff --git a/models/sale_order.py b/models/sale_order.py
index 7702b93bb0c..56047b64180 100644
--- a/models/sale_order.py
+++ b/models/sale_order.py
@@ -310,7 +310,7 @@ class SaleOrder(models.Model):
                     # Can't remove the lines directly as we might be in a recordset loop
                     lines_to_remove += lines
                 else:
-                    value.update(price_unit=0.0)
+                    values.update(price_unit=0.0)
                     order.write({'order_line': [(1, line.id, values) for line in lines]})
             return lines_to_remove