diff --git a/mycaldav/views.py b/mycaldav/views.py
index 566649c..e211845 100644
--- a/mycaldav/views.py
+++ b/mycaldav/views.py
@@ -7,6 +7,7 @@ from django.views import generic
 from django.template import loader
 from django.views.decorators.clickjacking import xframe_options_exempt
 from django.contrib.auth.decorators import login_required
+from django.db.models import Q
 
 
 import caldav as cal