diff --git a/mode-customizations/ruby-mode.el b/mode-customizations/ruby-mode.el
index d9b0686..8469afc 100644
--- a/mode-customizations/ruby-mode.el
+++ b/mode-customizations/ruby-mode.el
@@ -11,6 +11,7 @@
 (add-to-list 'auto-mode-alist '("Gemfile" . ruby-mode))
 (add-to-list 'auto-mode-alist '("Rakefile" . ruby-mode))
 (add-to-list 'auto-mode-alist '("Vagrantfile" . ruby-mode))
+(add-to-list 'auto-mode-alist '("Cheffile" . ruby-mode))
 
 (defun customizations-for-ruby-mode ()
   (interactive)