diff --git a/doc/installation.md b/doc/installation.md
index 961c54a..8e68ffb 100644
--- a/doc/installation.md
+++ b/doc/installation.md
@@ -48,11 +48,11 @@ Or without `use-package`:
 ```emacs-lisp
 (add-to-list 'load-path "./elisp")
 (require 'org-roam)
-(define-key 'org-roam-mode-map (kbd "C-c n l") #'org-roam)
-(define-key 'org-roam-mode-map (kbd "C-c n f") #'org-roam-find-file)
-(define-key 'org-roam-mode-map (kbd "C-c n b") #'org-roam-switch-to-buffer)
-(define-key 'org-roam-mode-map (kbd "C-c n g") #'org-roam-switch-to-buffer)
-(define-key 'org-mode-map (kbd "C-c n i") #'org-roam-insert)
+(define-key org-roam-mode-map (kbd "C-c n l") #'org-roam)
+(define-key org-roam-mode-map (kbd "C-c n f") #'org-roam-find-file)
+(define-key org-roam-mode-map (kbd "C-c n b") #'org-roam-switch-to-buffer)
+(define-key org-roam-mode-map (kbd "C-c n g") #'org-roam-switch-to-buffer)
+(define-key org-mode-map (kbd "C-c n i") #'org-roam-insert)
 (org-roam-mode +1)
 ```