diff --git a/src/applications/calendar/storage/PhabricatorCalendarEvent.php b/src/applications/calendar/storage/PhabricatorCalendarEvent.php
--- a/src/applications/calendar/storage/PhabricatorCalendarEvent.php
+++ b/src/applications/calendar/storage/PhabricatorCalendarEvent.php
@@ -4,7 +4,8 @@
   implements PhabricatorPolicyInterface,
   PhabricatorMarkupInterface,
   PhabricatorApplicationTransactionInterface,
-  PhabricatorSubscribableInterface {
+  PhabricatorSubscribableInterface,
+  PhabricatorTokenReceiverInterface {
 
   protected $name;
   protected $userPHID;
@@ -234,4 +235,11 @@
   public function shouldAllowSubscription($phid) {
     return true;
   }
+
+/* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
+
+
+  public function getUsersToNotifyOfTokenGiven() {
+    return array($this->getUserPHID());
+  }
 }