diff --git a/emacs/.emacs.d/init.org b/emacs/.emacs.d/init.org
index d7a6464..18bac75 100644
--- a/emacs/.emacs.d/init.org
+++ b/emacs/.emacs.d/init.org
@@ -442,6 +442,17 @@ To start off, first I need to enable lexical binding.
                            'face '(:family "Font Awesome" :height 0.75)))
    #+END_SRC
 
+** Diff highlight mode
+
+   Show the state of lines added, changed and removed since the last
+   commit.
+
+   #+BEGIN_SRC emacs-lisp
+     (ensure-library diff-hl)
+     (require 'diff-hl)
+     (global-diff-hl-mode)
+   #+END_SRC
+
 * Major modes
 
 ** Emacs lisp mode