diff --git a/README.md b/README.md
index 7f7c5fd..b380a6b 100644
--- a/README.md
+++ b/README.md
@@ -527,7 +527,7 @@ Now your function `foo` is interactive, you can use it in a
 keybinding:
 
 ``` lisp
-(define-key emacs-lisp-mode (kbd "C-c C-f") 'foo)
+(define-key emacs-lisp-mode-mode (kbd "C-c C-f") 'foo)
 ```
 
 ## Defining your own major mode
@@ -683,4 +683,4 @@ need a `(provide 'foo)` line at the bottom of your file for this to work.
 * http://www.delorie.com/gnu/docs/emacs-lisp-intro/emacs-lisp-intro_toc.html
 * http://cjohansen.no/an-introduction-to-elisp
 * http://emacswiki.org/emacs/ElispCookbook
-* [Emacs cheah sheet](https://web.archive.org/web/20150525182115/http://wikemacs.org/wiki/Emacs_Lisp_Cheat_Sheet)
\ No newline at end of file
+* [Emacs cheah sheet](https://web.archive.org/web/20150525182115/http://wikemacs.org/wiki/Emacs_Lisp_Cheat_Sheet)
diff --git a/README.org b/README.org
index 7dfd16e..a32131e 100644
--- a/README.org
+++ b/README.org
@@ -494,7 +494,7 @@ Now your function `foo` is interactive, you can use it in a
 keybinding:
 
 #+BEGIN_SRC emacs-lisp
-  (define-key emacs-lisp-mode (kbd "C-c C-f") 'foo)
+  (define-key emacs-lisp-mode-map (kbd "C-c C-f") 'foo)
 #+END_SRC
 
 ** Defining your own major mode