diff --git a/chrono/api/views.py b/chrono/api/views.py
index 6f0d64d3..587b2d2c 100644
--- a/chrono/api/views.py
+++ b/chrono/api/views.py
@@ -211,13 +211,13 @@ class Datetimes(APIView):
                                       reverse('api-fillslot',
                                           kwargs={
                                               'agenda_identifier': agenda.slug,
-                                              'event_identifier': x.slug,
+                                              'event_identifier': x.slug or x.id,
                                       })),
                                   'status_url': request.build_absolute_uri(
                                       reverse('api-event-status',
                                           kwargs={
                                               'agenda_identifier': agenda.slug,
-                                              'event_identifier': x.slug,
+                                              'event_identifier': x.slug or x.id,
                                       }))
                                   },
                               } for x in entries]}
diff --git a/tests/test_api.py b/tests/test_api.py
index 48ea3457..ffba4490 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -225,7 +225,8 @@ def test_datetime_api_status_url(app, some_data):
     agenda = Agenda.objects.get(label=u'Foo bar2')
     resp = app.get('/api/agenda/%s/datetimes/' % agenda.slug)
     for datum in resp.json['data']:
-        assert urlparse.urlparse(datum['api']['status_url']).path == '/api/agenda/%s/status/%s/' % (agenda.slug, datum['slug'])
+        assert urlparse.urlparse(datum['api']['status_url']).path == '/api/agenda/%s/status/%s/' % (
+                agenda.slug, datum['slug'] or datum['id'])
 
 def test_datetimes_api_meetings_agenda(app, meetings_agenda):
     meeting_type = MeetingType.objects.get(agenda=meetings_agenda)
@@ -337,7 +338,7 @@ def test_booking_api(app, some_data, user):
     for agenda_key in (agenda.slug, agenda.id):  # acces datetimes via agenda slug or id (legacy)
         resp_datetimes = app.get('/api/agenda/%s/datetimes/' % agenda_key)
         event_fillslot_url = [x for x in resp_datetimes.json['data'] if x['id'] == event.id][0]['api']['fillslot_url']
-        assert urlparse.urlparse(event_fillslot_url).path == '/api/agenda/%s/fillslot/%s/' % (agenda.slug, event.slug)
+        assert urlparse.urlparse(event_fillslot_url).path == '/api/agenda/%s/fillslot/%s/' % (agenda.slug, event.slug or event.id)
 
     app.authorization = ('Basic', ('john.doe', 'password'))
     resp = app.post('/api/agenda/%s/fillslot/%s/' % (agenda.slug, event.id))