diff --git a/mandelstudio/templates/carbasa/headers/header.html b/mandelstudio/templates/carbasa/headers/header.html
index c902554..75fabe2 100644
--- a/mandelstudio/templates/carbasa/headers/header.html
+++ b/mandelstudio/templates/carbasa/headers/header.html
@@ -53,7 +53,7 @@
             </div>
             {% endblock %}
 
-            {% esi_fragment 'oxyan/headers/partials/carbasa-user-bar.html' with sessionid=True oscar_open_basket=True messages=messages request=request csrf_token=csrf_token user=user basket=basket num_unread_notifications=num_unread_notifications only %}
+            {% esi_fragment 'oxyan/headers/partials/carbasa-user-bar.html' with sessionid=True oscar_open_basket=True messages=messages request=request csrf_token=csrf_token user=user|default:None basket=basket|default:None num_unread_notifications=num_unread_notifications|default:0 only %}
 
             {% block language_chooser %}{% endblock language_chooser %}