diff --git a/addons/sale/models/sale_order.py b/addons/sale/models/sale_order.py
index f800a16abde..7cc6575e500 100644
--- a/addons/sale/models/sale_order.py
+++ b/addons/sale/models/sale_order.py
@@ -471,7 +471,7 @@ class SaleOrder(models.Model):
                 }
             }
 
-    @api.onchange('pricelist_id')
+    @api.onchange('pricelist_id', 'order_line')
     def _onchange_pricelist_id(self):
         if self.order_line and self.pricelist_id and self._origin.pricelist_id != self.pricelist_id:
             self.show_update_pricelist = True