diff --git a/runtime/ftplugin/i3config.vim b/runtime/ftplugin/i3config.vim
new file mode 100644
index 0000000..4204510
--- /dev/null
+++ b/runtime/ftplugin/i3config.vim
@@ -0,0 +1,13 @@
+" Vim filetype plugin file
+" Language: i3 config file
+" Original Author: Mohamed Boughaba <mohamed dot bgb at gmail dot com>
+" Maintainer: Quentin Hibon
+" Version: 0.4
+" Last Change: 2021 Dec 14
+
+if exists("b:did_ftplugin") | finish | endif
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setlocal cms<"
+
+setlocal commentstring=#\ %s