diff --git a/src/pretix/presale/views/event.py b/src/pretix/presale/views/event.py
index feabd46835..d942b03ccd 100644
--- a/src/pretix/presale/views/event.py
+++ b/src/pretix/presale/views/event.py
@@ -546,7 +546,7 @@ class EventIndex(EventViewMixin, EventListMixin, CartMixin, TemplateView):
             if self.request.event.settings.event_list_available_only and not voucher:
                 context['subevent_list'] = [
                     se for se in context['subevent_list']
-                    if not se.presale_has_ended and se.best_availability_state >= Quota.AVAILABILITY_RESERVED
+                    if not se.presale_has_ended and (se.best_availability_state is None or se.best_availability_state >= Quota.AVAILABILITY_RESERVED)
                 ]
         return context