diff --git a/elisp/hy.el b/elisp/hy.el
index e40d7d3..1856603 100644
--- a/elisp/hy.el
+++ b/elisp/hy.el
@@ -326,6 +326,9 @@
   (setq font-lock-defaults
         '(hy-font-lock-kwds)))
 
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.hy\\'" . hy-mode))
+
 ;;;###autoload
 (define-derived-mode hy-mode prog-mode "Hy"
   "Major mode for editing Hy files."