diff --git a/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php b/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php
index 40295809..59873ffa 100644
--- a/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php
+++ b/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php
@@ -70,6 +70,16 @@ final class Events
      */
     const INVITATION_ACCEPT = 'invitationAccept';
 
+    /**
+     * An invitation is rejected.
+     *
+     * This event is triggered after an invitation has been rejected by a
+     * visitor. An associative array with the following items is passed to the
+     * event handlers:
+     *  - "invitation": an instance of {@link \Mibew\Thread} class.
+     */
+    const INVITATION_REJECT = 'invitationReject';
+
     /**
      * An operator cannot be authenticated.
      *
diff --git a/src/mibew/libs/invitation.php b/src/mibew/libs/invitation.php
index 5b8bf3c2..8fedc065 100644
--- a/src/mibew/libs/invitation.php
+++ b/src/mibew/libs/invitation.php
@@ -206,6 +206,8 @@ function invitation_accept($visitor_id)
 /**
  * Inviation was rejected by visitor
  *
+ * Triggers {@link \Mibew\EventDispatcher\Events::INVITATION_REJECT} event.
+ *
  * @param int $visitor_id ID of the visitor
  */
 function invitation_reject($visitor_id)
@@ -237,6 +239,9 @@ function invitation_reject($visitor_id)
             ':now' => time(),
         )
     );
+
+    $args = array('invitation' => $thread);
+    EventDispatcher::getInstance()->triggerEvent(Events::INVITATION_REJECT, $args);
 }
 
 /**