diff --git a/{{cookiecutter.project_slug}}/{{cookiecutter.app_name}}/modifiers.py b/{{cookiecutter.project_slug}}/{{cookiecutter.app_name}}/modifiers.py
index 831351ab..901741a1 100644
--- a/{{cookiecutter.project_slug}}/{{cookiecutter.app_name}}/modifiers.py
+++ b/{{cookiecutter.project_slug}}/{{cookiecutter.app_name}}/modifiers.py
@@ -19,7 +19,7 @@ def get_choice(self):
         return (self.identifier, _("Postal shipping"))
 
     def add_extra_cart_row(self, cart, request):
-        if not self.is_active(cart) and len(cart_modifiers_pool.get_shipping_modifiers()) > 1:
+        if not self.is_active(cart.extra.get('shipping_modifier')) and len(cart_modifiers_pool.get_shipping_modifiers()) > 1:
             return
         # add a shipping flat fee
         amount = Money('5')