diff --git a/addons/website_sale_coupon/models/sale_order.py b/addons/website_sale_coupon/models/sale_order.py
index e9e07575bb2..2657a534dce 100644
--- a/addons/website_sale_coupon/models/sale_order.py
+++ b/addons/website_sale_coupon/models/sale_order.py
@@ -71,7 +71,7 @@ class SaleOrder(models.Model):
 
     def _get_free_shipping_lines(self):
         self.ensure_one()
-        free_shipping_prgs_ids = self.no_code_promo_program_ids.filtered(lambda p: p.reward_type == 'free_shipping')
+        free_shipping_prgs_ids = self._get_applied_programs_with_rewards_on_current_order().filtered(lambda p: p.reward_type == 'free_shipping')
         if not free_shipping_prgs_ids:
             return self.env['sale.order.line']
         free_shipping_product_ids = free_shipping_prgs_ids.mapped('discount_line_product_id')