diff --git a/addons/sale_stock/models/sale_order.py b/addons/sale_stock/models/sale_order.py
index cfae2e5da54..fd2e8ed7cd2 100644
--- a/addons/sale_stock/models/sale_order.py
+++ b/addons/sale_stock/models/sale_order.py
@@ -49,7 +49,7 @@ class SaleOrder(models.Model):
         for order in self:
             dates_list = []
             confirm_date = fields.Datetime.from_string(order.confirmation_date if order.state == 'sale' else fields.Datetime.now())
-            for line in order.order_line.filtered(lambda x: x.state != 'cancel'):
+            for line in order.order_line.filtered(lambda x: x.state != 'cancel' and not x._is_delivery()):
                 dt = confirm_date + timedelta(days=line.customer_lead or 0.0)
                 dates_list.append(dt)
             if dates_list: