diff --git a/src/pretix/presale/views/cart.py b/src/pretix/presale/views/cart.py
index 8c26e77eb2..5174584a22 100644
--- a/src/pretix/presale/views/cart.py
+++ b/src/pretix/presale/views/cart.py
@@ -426,9 +426,11 @@ class RedeemView(NoSearchIndexViewMixin, EventViewMixin, TemplateView):
         )
 
         if self.request.event.settings.redirect_to_checkout_directly:
-            context['cart_redirect'] = eventreverse(self.request.event, 'presale:event.checkout.start')
+            context['cart_redirect'] = eventreverse(self.request.event, 'presale:event.checkout.start',
+                                                    kwargs={'cart_namespace': kwargs.get('cart_namespace') or ''})
         else:
-            context['cart_redirect'] = eventreverse(self.request.event, 'presale:event.index')
+            context['cart_redirect'] = eventreverse(self.request.event, 'presale:event.index',
+                                                    kwargs={'cart_namespace': kwargs.get('cart_namespace') or ''})
         if context['cart_redirect'].startswith('https:'):
             context['cart_redirect'] = '/' + context['cart_redirect'].split('/', 3)[3]
 
diff --git a/src/pretix/presale/views/event.py b/src/pretix/presale/views/event.py
index b29599d701..48a7fcaa0b 100644
--- a/src/pretix/presale/views/event.py
+++ b/src/pretix/presale/views/event.py
@@ -292,7 +292,8 @@ class EventIndex(EventViewMixin, EventListMixin, CartMixin, TemplateView):
             )
         )
         if self.request.event.settings.redirect_to_checkout_directly:
-            context['cart_redirect'] = eventreverse(self.request.event, 'presale:event.checkout.start')
+            context['cart_redirect'] = eventreverse(self.request.event, 'presale:event.checkout.start',
+                                                    kwargs={'cart_namespace': kwargs.get('cart_namespace') or ''})
             if context['cart_redirect'].startswith('https:'):
                 context['cart_redirect'] = '/' + context['cart_redirect'].split('/', 3)[3]
         else: