diff --git a/src/onegov/event/models/occurrence.py b/src/onegov/event/models/occurrence.py
index 1e48307457..86dccdf8f7 100644
--- a/src/onegov/event/models/occurrence.py
+++ b/src/onegov/event/models/occurrence.py
@@ -5,7 +5,6 @@
 from onegov.core.orm import Base
 from onegov.core.orm.mixins import TimestampMixin
 from onegov.core.orm.types import UUID
-from onegov.event.models import Event
 from onegov.event.models.mixins import OccurrenceMixin
 from onegov.gis import Coordinates
 from pytz import UTC
@@ -20,6 +19,7 @@
 from typing import TYPE_CHECKING
 if TYPE_CHECKING:
     import uuid
+    from onegov.event.models import Event
     from sqlalchemy.sql import ClauseElement