diff --git a/src/pretix/control/forms/subevents.py b/src/pretix/control/forms/subevents.py
index 474d731bcd..236ec69c38 100644
--- a/src/pretix/control/forms/subevents.py
+++ b/src/pretix/control/forms/subevents.py
@@ -464,7 +464,7 @@ class RRuleFormSetForm(RRuleForm):
 RRuleFormSet = formset_factory(
     RRuleFormSetForm,
     min_num=1, validate_min=True,
-    can_order=False, can_delete=True, extra=1
+    can_order=False, can_delete=True, extra=0
 )