diff --git a/oni-nxml/oni-nxml.el b/oni-nxml/oni-nxml.el
index 07c1c87..0ba3390 100644
--- a/oni-nxml/oni-nxml.el
+++ b/oni-nxml/oni-nxml.el
@@ -4,8 +4,8 @@
 
 ;; Author: Tom Willemse <tom@ryuslash.org>
 ;; Keywords: local
-;; Version: 2019.1210.225630
-;; Package-Requires: (oni-yasnippet)
+;; Version: 2020.0228.102451
+;; Package-Requires: (oni-yasnippet reformatter)
 
 ;; 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
@@ -52,6 +52,11 @@
 
 (add-hook 'nxml-mode-hook 'oni-nxml--auto-fill-mode)
 
+(reformatter-define oni-nxml-xmllint
+  :program "xmllint"
+  :args '("--nonet" "--format" "-")
+  :lighter "")
+
 ;;;###autoload
 (add-to-list 'auto-mode-alist '("\\.targets\\'" . nxml-mode))
 ;;;###autoload