diff --git a/runtime/syntax/htmlm4.vim b/runtime/syntax/htmlm4.vim
new file mode 100644
index 0000000..3119d2d
--- /dev/null
+++ b/runtime/syntax/htmlm4.vim
@@ -0,0 +1,41 @@
+" Vim syntax file
+" Language:	HTML and M4
+" Maintainer:	Claudio Fleiner <claudio@fleiner.com>
+" URL:		http://www.fleiner.com/vim/syntax/htmlm4.vim
+" Last Change:	2001 Apr 30
+
+" For version 5.x: Clear all syntax items
+" For version 6.x: Quit when a syntax file was already loaded
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+" we define it here so that included files can test for it
+if !exists("main_syntax")
+  let main_syntax='htmlm4'
+endif
+
+if version < 600
+  so <sfile>:p:h/html.vim
+else
+  runtime! syntax/html.vim
+endif
+unlet b:current_syntax
+syn case match
+
+if version < 600
+  so <sfile>:p:h/m4.vim
+else
+  runtime! syntax/m4.vim
+endif
+unlet b:current_syntax
+syn cluster htmlPreproc add=@m4Top
+syn cluster m4StringContents add=htmlTag,htmlEndTag
+
+let b:current_syntax = "htmlm4"
+
+if main_syntax == 'htmlm4'
+  unlet main_syntax
+endif