diff --git a/module/language/elisp/boot.el b/module/language/elisp/boot.el
index 78bf61dcf..cd5ddfbcd 100644
--- a/module/language/elisp/boot.el
+++ b/module/language/elisp/boot.el
@@ -1,4 +1,4 @@
-;;; Guile Emacs Lisp
+;;; Guile Emacs Lisp -*- lexical-binding: t -*-
 
 ;;; Copyright (C) 2011 Free Software Foundation, Inc.