diff --git a/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php b/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php
index 6bf48e817d..0486474dcd 100644
--- a/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php
+++ b/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php
@@ -8,6 +8,10 @@ final class PhabricatorCalendarEventPHIDType extends PhabricatorPHIDType {
     return pht('Event');
   }
 
+  public function getPHIDTypeApplicationClass() {
+    return 'PhabricatorCalendarApplication';
+  }
+
   public function newObject() {
     return new PhabricatorCalendarEvent();
   }