diff --git a/runtime/ftplugin/cs.vim b/runtime/ftplugin/cs.vim
index f53ffcb..0734d11 100644
--- a/runtime/ftplugin/cs.vim
+++ b/runtime/ftplugin/cs.vim
@@ -2,7 +2,7 @@
 " Language:            C#
 " Maintainer:          Nick Jensen <nickspoon@gmail.com>
 " Former Maintainer:   Johannes Zellner <johannes@zellner.org>
-" Last Change:         2021-12-07
+" Last Change:         2022-11-16
 " License:             Vim (see :h license)
 " Repository:          https://github.com/nickspoons/vim-cs
 
@@ -25,8 +25,9 @@
 
 if exists('loaded_matchit') && !exists('b:match_words')
   " #if/#endif support included by default
+  let b:match_ignorecase = 0
   let b:match_words = '\%(^\s*\)\@<=#\s*region\>:\%(^\s*\)\@<=#\s*endregion\>,'
-  let b:undo_ftplugin .= ' | unlet! b:match_words'
+  let b:undo_ftplugin .= ' | unlet! b:match_ignorecase b:match_words'
 endif
 
 if (has('gui_win32') || has('gui_gtk')) && !exists('b:browsefilter')