diff --git a/configuration.org b/configuration.org
index 8f80099..f4b1a39 100644
--- a/configuration.org
+++ b/configuration.org
@@ -3017,7 +3017,8 @@ Because that’s still my favourite language.
 #+begin_src emacs-lisp
 (use-package fish-mode
   :hook
-  (fish-mode . (lambda () (add-hook 'before-save-hook 'fish_indent-before-save))))
+  (fish-mode . (lambda () (add-hook 'before-save-hook 'fish_indent-before-save)))
+  :mode "\\.fish\\'")
 #+end_src
 
 ** ~gitlab-ci-mode~ and ~gitlab-ci-mode-flycheck~