diff --git a/src/infrastructure/diff/PhabricatorInlineCommentController.php b/src/infrastructure/diff/PhabricatorInlineCommentController.php
index bc4358ba55..4608ebeffa 100644
--- a/src/infrastructure/diff/PhabricatorInlineCommentController.php
+++ b/src/infrastructure/diff/PhabricatorInlineCommentController.php
@@ -266,6 +266,8 @@ abstract class PhabricatorInlineCommentController
       // comment appears on. This is expected in the case of ghost comments.
       // We currently put the new comment on the visible changeset, not the
       // original comment's changeset.
+
+      $this->isNewFile = $reply_comment->getIsNewFile();
     }
   }