diff --git a/src/pretix/presale/views/cart.py b/src/pretix/presale/views/cart.py
index 09cdbb6088..83b48f191c 100644
--- a/src/pretix/presale/views/cart.py
+++ b/src/pretix/presale/views/cart.py
@@ -46,7 +46,7 @@ class CartActionMixin:
         if '?' in u:
             u += '&require_cookie=true'
         else:
-            u += '?require_cookie=false'
+            u += '?require_cookie=true'
         return u
 
     def get_success_url(self, value=None):