diff --git a/oni-lua.el b/oni-lua.el
index 53c6ce1..4c6ec58 100644
--- a/oni-lua.el
+++ b/oni-lua.el
@@ -4,8 +4,8 @@
 
 ;; Author: Tom Willemse <chelys@rincewind>
 ;; Keywords: local
-;; Version: 2020.0906.130231
-;; Package-Requires: (lua-mode rainbow-delimiters)
+;; Version: 2020.0907.143421
+;; Package-Requires: (lua-mode oni-fci rainbow-delimiters)
 
 ;; This program is free software; you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
@@ -28,6 +28,11 @@
 
 (add-hook 'lua-mode-hook 'rainbow-delimiters-mode)
 
+(add-hook 'lua-mode-hook
+          (if (fboundp 'display-fill-column-indicator-mode)
+              'display-fill-column-indicator-mode
+            'fci-mode))
+
 ;;;###autoload(with-eval-after-load 'lua-mode (require 'oni-lua))
 
 (provide 'oni-lua)