diff --git a/runtime/ftplugin/autohotkey.vim b/runtime/ftplugin/autohotkey.vim
new file mode 100644
index 0000000..9cb4fd7
--- /dev/null
+++ b/runtime/ftplugin/autohotkey.vim
@@ -0,0 +1,16 @@
+" Vim filetype plugin file
+" Language:     AutoHotkey
+" Maintainer:   Peter Aronoff <peteraronoff@fastmail.com>
+" Last Changed: 2024 Jul 25
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal comments=:;
+setlocal commentstring=;\ %s
+
+let b:undo_ftplugin = "setlocal comments< commentstring<"
+
+" vim: nowrap sw=2 sts=2 ts=8 noet: