diff -urN HTML.orig/ftplugin/html/HTML.vim HTML/ftplugin/html/HTML.vim
--- HTML.orig/ftplugin/html/HTML.vim	2004-08-10 01:50:43 +0600
+++ HTML/ftplugin/html/HTML.vim	2004-10-13 19:23:57 +0600
@@ -57,6 +57,10 @@
 
 " ---- Initialization: -------------------------------------------------- {{{1
 
+if !exists("use_html_ftplugin")
+  finish
+endif
+
 if v:version < 600
   echoerr "HTML.vim no longer supports Vim versions prior to 6."
   finish