diff --git a/etc/forms/forms-d2.el b/etc/forms/forms-d2.el
index 67cdb9cd010..1b0d6426e03 100644
--- a/etc/forms/forms-d2.el
+++ b/etc/forms/forms-d2.el
@@ -1,4 +1,4 @@
-;;; forms-d2.el --- demo forms-mode
+;;; forms-d2.el --- demo forms-mode  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 1991, 1994-1997, 2001-2020 Free Software Foundation,
 ;; Inc.
diff --git a/etc/forms/forms-pass.el b/etc/forms/forms-pass.el
index 34d4548434b..0f4ab48247e 100644
--- a/etc/forms/forms-pass.el
+++ b/etc/forms/forms-pass.el
@@ -1,4 +1,4 @@
-;;; forms-pass.el --- passwd file demo for forms-mode
+;;; forms-pass.el --- passwd file demo for forms-mode  -*- lexical-binding:t -*-
 
 ;; This file is part of GNU Emacs.