diff --git a/src/pretix/base/models/event.py b/src/pretix/base/models/event.py
index aca5635d8..38dc7d33a 100644
--- a/src/pretix/base/models/event.py
+++ b/src/pretix/base/models/event.py
@@ -632,10 +632,10 @@ class Event(EventMixin, LoggedModel):
             return super().presale_has_ended
 
     def delete_all_orders(self, really=False):
+        from .checkin import Checkin
         from .orders import (
             OrderFee, OrderPayment, OrderPosition, OrderRefund, Transaction,
         )
-        from .checkin import Checkin
 
         if not really:
             raise TypeError("Pass really=True as a parameter.")