diff --git a/addons/event/controllers/main.py b/addons/event/controllers/main.py
index 481fc5f27ba..f844e6a5d51 100644
--- a/addons/event/controllers/main.py
+++ b/addons/event/controllers/main.py
@@ -9,7 +9,7 @@ from odoo.http import Controller, request, route, content_disposition
 class EventController(Controller):
 
     @route(['''/event/<model("event.event", "[('state', 'in', ('confirm', 'done'))]"):event>/ics'''], type='http', auth="public")
-    def event_ics_file(self, event):
+    def event_ics_file(self, event, **kwargs):
         if not event or not event.registration_ids:
             return request.not_found()
         files = event._get_ics_file()