diff --git a/runtime/syntax/haskell.vim b/runtime/syntax/haskell.vim
new file mode 100644
index 0000000..21fcf81
--- /dev/null
+++ b/runtime/syntax/haskell.vim
@@ -0,0 +1,193 @@
+" Vim syntax file
+" Language:		Haskell
+" Maintainer:		Haskell Cafe mailinglist <haskell-cafe@haskell.org>
+" Last Change:		2004 Feb 23
+" Original Author:	John Williams <jrw@pobox.com>
+"
+" Thanks to Ryan Crumley for suggestions and John Meacham for
+" pointing out bugs. Also thanks to Ian Lynagh and Donald Bruce Stewart
+" for providing the inspiration for the inclusion of the handling
+" of C preprocessor directives, and for pointing out a bug in the
+" end-of-line comment handling.
+"
+" Options-assign a value to these variables to turn the option on:
+"
+" hs_highlight_delimiters - Highlight delimiter characters--users
+"			    with a light-colored background will
+"			    probably want to turn this on.
+" hs_highlight_boolean - Treat True and False as keywords.
+" hs_highlight_types - Treat names of primitive types as keywords.
+" hs_highlight_more_types - Treat names of other common types as keywords.
+" hs_highlight_debug - Highlight names of debugging functions.
+" hs_allow_hash_operator - Don't highlight seemingly incorrect C
+"			   preprocessor directives but assume them to be
+"			   operators
+"
+" 2004 Feb 19: Added C preprocessor directive handling, corrected eol comments
+"	       cleaned away literate haskell support (should be entirely in
+"	       lhaskell.vim)
+" 2004 Feb 20: Cleaned up C preprocessor directive handling, fixed single \
+"	       in eol comment character class
+" 2004 Feb 23: Made the leading comments somewhat clearer where it comes
+"	       to attribution of work.
+
+" Remove any old syntax stuff hanging around
+if version < 600
+  syn clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+" (Qualified) identifiers (no default highlighting)
+syn match ConId "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=\<[A-Z][a-zA-Z0-9_']*\>"
+syn match VarId "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=\<[a-z][a-zA-Z0-9_']*\>"
+
+" Infix operators--most punctuation characters and any (qualified) identifier
+" enclosed in `backquotes`. An operator starting with : is a constructor,
+" others are variables (e.g. functions).
+syn match hsVarSym "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[-!#$%&\*\+/<=>\?@\\^|~.][-!#$%&\*\+/<=>\?@\\^|~:.]*"
+syn match hsConSym "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=:[-!#$%&\*\+./<=>\?@\\^|~:]*"
+syn match hsVarSym "`\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[a-z][a-zA-Z0-9_']*`"
+syn match hsConSym "`\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[A-Z][a-zA-Z0-9_']*`"
+
+" Reserved symbols--cannot be overloaded.
+syn match hsDelimiter  "(\|)\|\[\|\]\|,\|;\|_\|{\|}"
+
+" Strings and constants
+syn match   hsSpecialChar	contained "\\\([0-9]\+\|o[0-7]\+\|x[0-9a-fA-F]\+\|[\"\\'&\\abfnrtv]\|^[A-Z^_\[\\\]]\)"
+syn match   hsSpecialChar	contained "\\\(NUL\|SOH\|STX\|ETX\|EOT\|ENQ\|ACK\|BEL\|BS\|HT\|LF\|VT\|FF\|CR\|SO\|SI\|DLE\|DC1\|DC2\|DC3\|DC4\|NAK\|SYN\|ETB\|CAN\|EM\|SUB\|ESC\|FS\|GS\|RS\|US\|SP\|DEL\)"
+syn match   hsSpecialCharError	contained "\\&\|'''\+"
+syn region  hsString		start=+"+  skip=+\\\\\|\\"+  end=+"+  contains=hsSpecialChar
+syn match   hsCharacter		"[^a-zA-Z0-9_']'\([^\\]\|\\[^']\+\|\\'\)'"lc=1 contains=hsSpecialChar,hsSpecialCharError
+syn match   hsCharacter		"^'\([^\\]\|\\[^']\+\|\\'\)'" contains=hsSpecialChar,hsSpecialCharError
+syn match   hsNumber		"\<[0-9]\+\>\|\<0[xX][0-9a-fA-F]\+\>\|\<0[oO][0-7]\+\>"
+syn match   hsFloat		"\<[0-9]\+\.[0-9]\+\([eE][-+]\=[0-9]\+\)\=\>"
+
+" Keyword definitions. These must be patters instead of keywords
+" because otherwise they would match as keywords at the start of a
+" "literate" comment (see lhs.vim).
+syn match hsModule		"\<module\>"
+syn match hsImport		"\<import\>.*"he=s+6 contains=hsImportMod
+syn match hsImportMod		contained "\<\(as\|qualified\|hiding\)\>"
+syn match hsInfix		"\<\(infix\|infixl\|infixr\)\>"
+syn match hsStructure		"\<\(class\|data\|deriving\|instance\|default\|where\)\>"
+syn match hsTypedef		"\<\(type\|newtype\)\>"
+syn match hsStatement		"\<\(do\|case\|of\|let\|in\)\>"
+syn match hsConditional		"\<\(if\|then\|else\)\>"
+
+" Not real keywords, but close.
+if exists("hs_highlight_boolean")
+  " Boolean constants from the standard prelude.
+  syn match hsBoolean "\<\(True\|False\)\>"
+endif
+if exists("hs_highlight_types")
+  " Primitive types from the standard prelude and libraries.
+  syn match hsType "\<\(Int\|Integer\|Char\|Bool\|Float\|Double\|IO\|Void\|Addr\|Array\|String\)\>"
+endif
+if exists("hs_highlight_more_types")
+  " Types from the standard prelude libraries.
+  syn match hsType "\<\(Maybe\|Either\|Ratio\|Complex\|Ordering\|IOError\|IOResult\|ExitCode\)\>"
+  syn match hsMaybe    "\<Nothing\>"
+  syn match hsExitCode "\<\(ExitSuccess\)\>"
+  syn match hsOrdering "\<\(GT\|LT\|EQ\)\>"
+endif
+if exists("hs_highlight_debug")
+  " Debugging functions from the standard prelude.
+  syn match hsDebug "\<\(undefined\|error\|trace\)\>"
+endif
+
+
+" Comments
+syn match   hsLineComment      "---*\([^-!#$%&\*\+./<=>\?@\\^|~].*\)\?$"
+syn region  hsBlockComment     start="{-"  end="-}" contains=hsBlockComment
+syn region  hsPragma	       start="{-#" end="#-}"
+
+" C Preprocessor directives. Shamelessly ripped from c.vim and trimmed
+" First, see whether to flag directive-like lines or not
+if (!exists("hs_allow_hash_operator"))
+    syn match	cError		display "^\s*\(%:\|#\).*$"
+endif
+" Accept %: for # (C99)
+syn region	cPreCondit	start="^\s*\(%:\|#\)\s*\(if\|ifdef\|ifndef\|elif\)\>" skip="\\$" end="$" end="//"me=s-1 contains=cComment,cCppString,cCommentError
+syn match	cPreCondit	display "^\s*\(%:\|#\)\s*\(else\|endif\)\>"
+syn region	cCppOut		start="^\s*\(%:\|#\)\s*if\s\+0\+\>" end=".\@=\|$" contains=cCppOut2
+syn region	cCppOut2	contained start="0" end="^\s*\(%:\|#\)\s*\(endif\>\|else\>\|elif\>\)" contains=cCppSkip
+syn region	cCppSkip	contained start="^\s*\(%:\|#\)\s*\(if\>\|ifdef\>\|ifndef\>\)" skip="\\$" end="^\s*\(%:\|#\)\s*endif\>" contains=cCppSkip
+syn region	cIncluded	display contained start=+"+ skip=+\\\\\|\\"+ end=+"+
+syn match	cIncluded	display contained "<[^>]*>"
+syn match	cInclude	display "^\s*\(%:\|#\)\s*include\>\s*["<]" contains=cIncluded
+syn cluster	cPreProcGroup	contains=cPreCondit,cIncluded,cInclude,cDefine,cCppOut,cCppOut2,cCppSkip,cCommentStartError
+syn region	cDefine		matchgroup=cPreCondit start="^\s*\(%:\|#\)\s*\(define\|undef\)\>" skip="\\$" end="$"
+syn region	cPreProc	matchgroup=cPreCondit start="^\s*\(%:\|#\)\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend
+
+syn region	cComment	matchgroup=cCommentStart start="/\*" end="\*/" contains=cCommentStartError,cSpaceError contained
+syntax match	cCommentError	display "\*/" contained
+syntax match	cCommentStartError display "/\*"me=e-1 contained
+syn region	cCppString	start=+L\="+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=cSpecial contained
+
+" Define the default highlighting.
+" For version 5.7 and earlier: only when not done already
+" For version 5.8 and later: only when an item doesn't have highlighting yet
+if version >= 508 || !exists("did_hs_syntax_inits")
+  if version < 508
+    let did_hs_syntax_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+
+  HiLink hsModule			  hsStructure
+  HiLink hsImport			  Include
+  HiLink hsImportMod			  hsImport
+  HiLink hsInfix			  PreProc
+  HiLink hsStructure			  Structure
+  HiLink hsStatement			  Statement
+  HiLink hsConditional			  Conditional
+  HiLink hsSpecialChar			  SpecialChar
+  HiLink hsTypedef			  Typedef
+  HiLink hsVarSym			  hsOperator
+  HiLink hsConSym			  hsOperator
+  HiLink hsOperator			  Operator
+  if exists("hs_highlight_delimiters")
+    " Some people find this highlighting distracting.
+    HiLink hsDelimiter			  Delimiter
+  endif
+  HiLink hsSpecialCharError		  Error
+  HiLink hsString			  String
+  HiLink hsCharacter			  Character
+  HiLink hsNumber			  Number
+  HiLink hsFloat			  Float
+  HiLink hsConditional			  Conditional
+  HiLink hsLiterateComment		  hsComment
+  HiLink hsBlockComment		  hsComment
+  HiLink hsLineComment			  hsComment
+  HiLink hsComment			  Comment
+  HiLink hsPragma			  SpecialComment
+  HiLink hsBoolean			  Boolean
+  HiLink hsType			  Type
+  HiLink hsMaybe			  hsEnumConst
+  HiLink hsOrdering			  hsEnumConst
+  HiLink hsEnumConst			  Constant
+  HiLink hsDebug			  Debug
+
+  HiLink cCppString		hsString
+  HiLink cCommentStart		hsComment
+  HiLink cCommentError		hsError
+  HiLink cCommentStartError	hsError
+  HiLink cInclude		Include
+  HiLink cPreProc		PreProc
+  HiLink cDefine		Macro
+  HiLink cIncluded		hsString
+  HiLink cError			Error
+  HiLink cPreCondit		PreCondit
+  HiLink cComment		Comment
+  HiLink cCppSkip		cCppOut
+  HiLink cCppOut2		cCppOut
+  HiLink cCppOut		Comment
+
+  delcommand HiLink
+endif
+
+let b:current_syntax = "haskell"
+
+" Options for vi: ts=8 sw=2 sts=2 nowrap noexpandtab ft=vim