diff --git a/rowers/views.py b/rowers/views.py
index 3b3e2e35..7013665b 100644
--- a/rowers/views.py
+++ b/rowers/views.py
@@ -1451,7 +1451,8 @@ def plannedsessions_icsemail_view(request,userid=0):
 
 
     response = HttpResponse(cal.to_ical())
-    response['Content-Disposition'] = 'attachment; filename="training_plan_%s.ics"' % request.user.id        
+    response['Content-Disposition'] = 'attachment; filename="training_plan_%s.ics"' % request.user.id
+    response['Content-Type'] = 'application/octet-stream'
 
     return response