diff --git a/gestioncof/views.py b/gestioncof/views.py
index 80f528f7..4f1e5009 100644
--- a/gestioncof/views.py
+++ b/gestioncof/views.py
@@ -14,6 +14,7 @@ from django.http import Http404, HttpResponse, HttpResponseForbidden
 from django.contrib.auth.decorators import login_required
 from django.contrib.auth.views import login as django_login_view
 from django.contrib.auth.models import User
+from django.contrib.sites.models import Site
 from django.utils import timezone
 import django.utils.six as six
 
@@ -710,12 +711,15 @@ def calendar_ics(request, token):
             tirage__active=True)
     shows = shows.distinct()
     vcal = Calendar()
+    site = Site.objects.get_current()
     for show in shows:
         vevent = Vevent()
         vevent.add('dtstart', show.date)
         vevent.add('dtend', show.date + timedelta(seconds=7200))
         vevent.add('summary', show.title)
         vevent.add('location', show.location.name)
+        vevent.add('uid', 'show-{:d}-{:d}@{:s}'.format(
+            show.pk, show.tirage_id, site.domain))
         vcal.add_component(vevent)
     if subscription.subscribe_to_events:
         for event in Event.objects.filter(old=False).all():
@@ -725,6 +729,8 @@ def calendar_ics(request, token):
             vevent.add('summary', event.title)
             vevent.add('location', event.location)
             vevent.add('description', event.description)
+            vevent.add('uid', 'event-{:d}@{:s}'.format(
+                event.pk, site.domain))
             vcal.add_component(vevent)
     response = HttpResponse(content=vcal.to_ical())
     response['Content-Type'] = "text/calendar"