diff --git a/bp/product/routes.py b/bp/product/routes.py
index 04b0fe9..4926173 100644
--- a/bp/product/routes.py
+++ b/bp/product/routes.py
@@ -250,7 +250,9 @@ def register():
                 "_types/product/_added.html",
                 cart=g.cart,
                 item=ci,
-                total = total
+                total=total,
+                calendar_total=lambda entries: 0,
+                calendar_cart_entries=[],
             )
 
         # normal POST: go to cart page