diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index 668d029..b69d267 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -75,6 +75,7 @@
 (add-hook 'nroff-mode-hook 'variable-pitch-mode)
 
 ;; file extensions
+(add-to-list 'auto-mode-alist '("\\.yuck\\'" . lisp-mode))
 (add-to-list 'auto-mode-alist '("\\.eml\\'" . mail-mode))
 (add-to-list 'auto-mode-alist '("\\.scd\\'" . markdown-mode))
 (add-to-list 'auto-mode-alist '("\\.3lua\\'" . nroff-mode))