diff --git a/quse-package.el b/quse-package.el
index 1d9959e..18602dc 100644
--- a/quse-package.el
+++ b/quse-package.el
@@ -1,4 +1,4 @@
-;;; quse-package.el --- Install and configure packages in one convenient macro.
+;;; quse-package.el --- Install and configure packages in one convenient macro. -*- lexical-binding: t; -*-
 
 ;; Copyright (C) 2015, 2016, 2017 Jacob MacDonald.
 
diff --git a/quse-package.org b/quse-package.org
index b7915b3..6e18580 100644
--- a/quse-package.org
+++ b/quse-package.org
@@ -70,7 +70,7 @@ Without further ado, the macro itself.
 
   #+NAME: header
   #+BEGIN_SRC emacs-lisp
-    ;;; quse-package.el --- Install and configure packages in one convenient macro.
+    ;;; quse-package.el --- Install and configure packages in one convenient macro. -*- lexical-binding: t; -*-
 
     ;; Copyright (C) 2015, 2016, 2017 Jacob MacDonald.