diff --git a/modules/home/users/crumb/emacs/modules/syd-ui.el b/modules/home/users/crumb/emacs/modules/syd-ui.el
index 2cf1be2..4be8e93 100755
--- a/modules/home/users/crumb/emacs/modules/syd-ui.el
+++ b/modules/home/users/crumb/emacs/modules/syd-ui.el
@@ -179,4 +179,16 @@ for example when calling `shell'.")
       :modeline nil
       :ttl nil)))
 
+(use-package form-feed-st
+  :config
+  ;; Set the colour of the horizontal lines to be the same as comments.
+  (custom-theme-set-faces
+   'user
+   `(form-feed-st-line
+     ((t :strike-through
+         ,(plist-get (custom-face-attributes-get font-lock-comment-face
+                                                 (selected-frame))
+                     :foreground)))))
+  (global-form-feed-st-mode))
+
 (provide 'syd-ui)