diff --git a/README.org b/README.org
index ca3532e..cdf873f 100644
--- a/README.org
+++ b/README.org
@@ -396,7 +396,7 @@ the contents of packages and allows to update packages to the latest version.
       ;; (setq major-mode-remap-alist '((python-mode . python-ts-mode)))
       ;; Plays nicely with eglot:
       (add-to-list 'auto-mode-alist
-                   `(,(rx ".py" (opt "[iw]") eos) . python-ts-mode)))))
+                   `(,(rx ".py" (opt (any "iw")) eos) . python-ts-mode)))))
 #+end_src
 
 * [[info:emacs#Faces][Text faces or styles (info)]]