diff --git a/init.el b/init.el
index f9c72e4..d44b0d0 100644
--- a/init.el
+++ b/init.el
@@ -1010,6 +1010,7 @@ math-block around the region."
 (define-key custom-bindings-map (kbd "C-c s")    'ispell-word)
 (define-key custom-bindings-map (kbd "C-c t")    'org-agenda-list)
 (define-key custom-bindings-map (kbd "C-x C-r")  'recentf-ido-find-file)
+(define-key custom-bindings-map (kbd "C-x m")    'mu4e)
 
 ;; Bind the functions defined [[sec:defuns][above]].
 
diff --git a/init.org b/init.org
index 61c9f85..d540b3f 100644
--- a/init.org
+++ b/init.org
@@ -1280,6 +1280,7 @@
      (define-key custom-bindings-map (kbd "C-c s")    'ispell-word)
      (define-key custom-bindings-map (kbd "C-c t")    'org-agenda-list)
      (define-key custom-bindings-map (kbd "C-x C-r")  'recentf-ido-find-file)
+     (define-key custom-bindings-map (kbd "C-x m")    'mu4e)
    #+END_SRC
 
    Bind the functions defined [[sec:defuns][above]].