diff --git a/addons/delivery/models/sale_order.py b/addons/delivery/models/sale_order.py
index 7fd0b96ec58..05bfa60c4f4 100644
--- a/addons/delivery/models/sale_order.py
+++ b/addons/delivery/models/sale_order.py
@@ -69,6 +69,8 @@ class SaleOrder(models.Model):
             else:
                 raise UserError(_('No carrier set for this order.'))
 
+        return True
+
     def _create_delivery_line(self, carrier, price_unit):
         SaleOrderLine = self.env['sale.order.line']