diff --git a/emacs/init.el b/emacs/init.el
index 92de4c6..3d1adf5 100644
--- a/emacs/init.el
+++ b/emacs/init.el
@@ -106,10 +106,11 @@
 
 ;; major modes
 (use-package cc-mode
+  :mode (("\\.zsc\\'" . c-mode)
+         ("\\.zc\\'"  . c-mode))
   :init
   (setq c-auto-align-backslashes nil)
-  (defvaralias 'c-basic-offset 'tab-width)
-  (add-to-list 'auto-mode-alist '("\\.zsc\\'" . c-mode)))
+  (defvaralias 'c-basic-offset 'tab-width))
 
 (use-package fish-mode
   :ensure t