diff --git wp-includes/pluggable.php wp-includes/pluggable.php
index 32fab32..7d9f896 100644
--- wp-includes/pluggable.php
+++ wp-includes/pluggable.php
@@ -1658,6 +1658,10 @@ function wp_notify_moderator($comment_id) {
 			$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
 			/* translators: 1: Comment text */
 			$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
+			if ( 0 !== $comment->comment_parent ) {
+				/* translators: Comment parent. 1: Comment parent URL */
+				$notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}" ) ) . "\r\n";
+			}
 			break;
 	}