diff --git a/runtime/syntax/xmath.vim b/runtime/syntax/xmath.vim
index a44bac4..e9c3762 100644
--- a/runtime/syntax/xmath.vim
+++ b/runtime/syntax/xmath.vim
@@ -1,8 +1,8 @@
 " Vim syntax file
 " Language:	xmath (a simulation tool)
 " Maintainer:	Dr. Charles E. Campbell, Jr. <NdrOchipS@PcampbellAfamily.Mbiz>
-" Last Change:	Sep 06, 2005
-" Version:	4
+" Last Change:	Apr 12, 2006
+" Version:	5
 " URL:	http://mysite.verizon.net/astronaut/vim/index.html#vimlinks_syntax
 
 " For version 5.x: Clear all syntax items
@@ -184,7 +184,7 @@
 " Comments:
 " xmath supports #...  (like Unix shells)
 "       and      #{ ... }# comment blocks
-syn keyword xmathTodo contained	TODO Todo DEBUG
+syn keyword xmathTodo contained	COMBAK	DEBUG	FIXME	Todo	TODO	XXX
 syn match   xmathComment	"#.*$"		contains=xmathString,xmathTodo,@Spell
 syn region  xmathCommentBlock	start="#{" end="}#"	contains=xmathString,xmathTodo