diff --git a/runtime/ftplugin/tex.vim b/runtime/ftplugin/tex.vim
new file mode 100644
index 0000000..1871e8f
--- /dev/null
+++ b/runtime/ftplugin/tex.vim
@@ -0,0 +1,112 @@
+" LaTeX filetype plugin
+" Language:     LaTeX (ft=tex)
+" Maintainer:   Benji Fisher, Ph.D. <benji@member.AMS.org>
+" Version:	1.2
+" Last Change:	Tue 11 May 2004 04:49:20 PM EDT
+"  URL:		http://www.vim.org/script.php?script_id=411
+
+" Only do this when not done yet for this buffer
+if exists("b:did_ftplugin")
+  finish
+endif
+
+" Don't load another plugin for this buffer
+let b:did_ftplugin = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+" This may be used to set b:tex_flavor.  A more complete version can be found
+" in foo.vim (see http://www.vim.org/script.php?script_id=72).
+if !exists("*s:GetModelines")
+  fun! s:GetModelines(pat, ...)
+    " Long but simple:  set start line and finish line.
+    let EOF = line("$")
+    if a:0 > 1
+      let start = a:1 | let finish = a:2
+    elseif a:0 == 1
+      if a:1 > 0
+	let finish = a:1
+      else
+	let start = EOF + a:1 + 1
+      endif
+    endif
+    if !exists("start") || start < 1
+      let start = 1
+    endif
+    if !exists("finish") || finish > EOF
+      let finish = EOF
+    endif
+    let n = 0
+    silent! execute start .",". finish
+	  \ 'g/' . escape(a:pat, "/") . "/let n=line('.')"
+    if n
+      execute "normal!\<C-O>"
+    endif
+    return n . ":"
+  endfun
+endif " !exists("*GetModelines")
+
+" Define the buffer-local variable b:tex_flavor to "tex" (for plain) or
+" "latex".
+" 1. Check the first line of the file for "%&<format>".
+" 2. Check the first 1000 lines for "\begin{document}".
+" 3. Check for a global variable g:tex_flavor, can be set in user's vimrc.
+" 4. Default to "latex".
+" 5. Strip "pdf" and change "plain" to "tex".
+if getline(1) =~ '^%&\s*\k\+'
+	let b:tex_flavor = matchstr(getline(1), '%&\s*\zs\k\+')
+elseif s:GetModelines('\\begin\s*{\s*document\s*}', 1000) != "0:"
+	let b:tex_flavor = "latex"
+elseif exists("g:tex_flavor")
+	let b:tex_flavor = g:tex_flavor
+else
+	let b:tex_flavor = "latex"
+endif
+let b:tex_flavor = substitute(b:tex_flavor, 'pdf', '', '')
+if b:tex_flavor == "plain"
+	let b:tex_flavor = "tex"
+endif
+
+" Set 'comments' to format dashed lists in comments
+setlocal com=sO:%\ -,mO:%\ \ ,eO:%%,:%
+
+" Set 'commentstring' to recognize the % comment character:
+" (Thanks to Ajit Thakkar.)
+setlocal cms=%%s
+
+" Allow "[d" to be used to find a macro definition:
+" Recognize plain TeX \def as well as LaTeX \newcommand and \renewcommand .
+" I may as well add the AMS-LaTeX DeclareMathOperator as well.
+let &l:define='\\\([egx]\|char\|mathchar\|count\|dimen\|muskip\|skip\|toks\)\='
+	\ .	'def\|\\font\|\\\(future\)\=let'
+	\ . '\|\\new\(count\|dimen\|skip\|muskip\|box\|toks\|read\|write'
+	\ .	'\|fam\|insert\)'
+	\ . '\|\\\(re\)\=new\(boolean\|command\|counter\|environment\|font'
+	\ . '\|if\|length\|savebox\|theorem\(style\)\=\)\s*\*\=\s*{\='
+	\ . '\|DeclareMathOperator\s*{\=\s*'
+
+" Tell Vim how to recognize LaTeX \include{foo} and plain \input bar :
+setlocal include=\\\\input\\\\|\\\\include{
+setlocal suffixesadd=.tex
+" On some file systems, "{" and "}" are inluded in 'isfname'.  In case the
+" TeX file has \include{fname} (LaTeX only), strip everything except "fname".
+let &l:includeexpr = "substitute(v:fname, '^.\\{-}{\\|}.*', '', 'g')"
+" fun! TexIncludeExpr()
+"   let fname = substitute(v:fname, '}.*', '', '')
+"   return fname
+" endfun
+
+" The following lines enable the macros/matchit.vim plugin for
+" extended matching with the % key.
+" TODO:  Customize this based on b:tex_flavor .
+if exists("loaded_matchit")
+  let b:match_ignorecase = 0
+    \ | let b:match_skip = 'r:\\\@<!\%(\\\\\)*%'
+    \ | let b:match_words = '(:),\[:],{:},\\(:\\),\\\[:\\],' .
+    \ '\\begin\s*\({\a\+\*\=}\):\\end\s*\1'
+endif " exists("loaded_matchit")
+
+let &cpo = s:save_cpo
+
+" vim:sts=2:sw=2: