diff --git a/config.org b/config.org
index 95277ee..bb88871 100644
--- a/config.org
+++ b/config.org
@@ -656,3 +656,14 @@
      (make-directory "~/.emacs-tmp/backup" t)
      (setq backup-directory-alist '(("." . "~/.emacs-tmp/backup")))
    #+end_src
+
+** Backup by Copying
+   By default Emacs moves a file to the backup location and then
+   creates a copy in the original location, which apart from being a
+   very strange thing to do also messes up hard links. Setting
+   [[help:backup-by-copying][backup-by-copying]] changes it to the more obvious behaviour of
+   simply copying the file to the backup location.
+
+   #+begin_src emacs-lisp
+     (setq backup-by-copying t)
+   #+end_src