diff --git a/src/applications/differential/editor/DifferentialTransactionEditor.php b/src/applications/differential/editor/DifferentialTransactionEditor.php
--- a/src/applications/differential/editor/DifferentialTransactionEditor.php
+++ b/src/applications/differential/editor/DifferentialTransactionEditor.php
@@ -613,7 +613,8 @@
     $viewer = $this->requireActor();
 
     $body = id(new PhabricatorMetaMTAMailBody())
-      ->setViewer($viewer);
+      ->setViewer($viewer)
+      ->setContextObject($object);
 
     $revision_uri = $this->getObjectLinkButtonURIForMail($object);
     $new_uri = $revision_uri.'/new/';