diff --git a/src/pretix/control/forms/item.py b/src/pretix/control/forms/item.py
index 20bbc77ea5..de1eae9433 100644
--- a/src/pretix/control/forms/item.py
+++ b/src/pretix/control/forms/item.py
@@ -392,6 +392,15 @@ class ItemCreateForm(I18nModelForm):
                 'grant_membership_duration_like_event',
                 'grant_membership_duration_days',
                 'grant_membership_duration_months',
+                'validity_mode',
+                'validity_fixed_from',
+                'validity_fixed_until',
+                'validity_dynamic_duration_minutes',
+                'validity_dynamic_duration_hours',
+                'validity_dynamic_duration_days',
+                'validity_dynamic_duration_months',
+                'validity_dynamic_start_choice',
+                'validity_dynamic_start_choice_day_limit',
             )
             for f in fields:
                 setattr(self.instance, f, getattr(src, f))