diff --git a/runtime/syntax/asn.vim b/runtime/syntax/asn.vim
new file mode 100644
index 0000000..9fc3d24
--- /dev/null
+++ b/runtime/syntax/asn.vim
@@ -0,0 +1,81 @@
+" Vim syntax file
+" Language:	ASN.1
+" Maintainer:	Claudio Fleiner <claudio@fleiner.com>
+" URL:		http://www.fleiner.com/vim/syntax/asn.vim
+" Last Change:	2001 Apr 26
+
+" 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
+
+" keyword definitions
+syn keyword asnExternal		DEFINITIONS BEGIN END IMPORTS EXPORTS FROM
+syn match   asnExternal		"\<IMPLICIT\s\+TAGS\>"
+syn match   asnExternal		"\<EXPLICIT\s\+TAGS\>"
+syn keyword asnFieldOption	DEFAULT OPTIONAL
+syn keyword asnTagModifier	IMPLICIT EXPLICIT
+syn keyword asnTypeInfo		ABSENT PRESENT SIZE UNIVERSAL APPLICATION PRIVATE
+syn keyword asnBoolValue	TRUE FALSE
+syn keyword asnNumber		MIN MAX
+syn match   asnNumber		"\<PLUS-INFINITY\>"
+syn match   asnNumber		"\<MINUS-INFINITY\>"
+syn keyword asnType		INTEGER REAL STRING BIT BOOLEAN OCTET NULL EMBEDDED PDV
+syn keyword asnType		BMPString IA5String TeletexString GeneralString GraphicString ISO646String NumericString PrintableString T61String UniversalString VideotexString VisibleString
+syn keyword asnType		ANY DEFINED
+syn match   asnType		"\.\.\."
+syn match   asnType		"OBJECT\s\+IDENTIFIER"
+syn match   asnType		"TYPE-IDENTIFIER"
+syn keyword asnType		UTF8String
+syn keyword asnStructure	CHOICE SEQUENCE SET OF ENUMERATED CONSTRAINED BY WITH COMPONENTS CLASS
+
+" Strings and constants
+syn match   asnSpecial		contained "\\\d\d\d\|\\."
+syn region  asnString		start=+"+  skip=+\\\\\|\\"+  end=+"+  contains=asnSpecial
+syn match   asnCharacter	"'[^\\]'"
+syn match   asnSpecialCharacter "'\\.'"
+syn match   asnNumber		"-\=\<\d\+L\=\>\|0[xX][0-9a-fA-F]\+\>"
+syn match   asnLineComment	"--.*"
+syn match   asnLineComment	"--.*--"
+
+syn match asnDefinition "^\s*[a-zA-Z][-a-zA-Z0-9_.\[\] \t{}]* *::="me=e-3 contains=asnType
+syn match asnBraces     "[{}]"
+
+syn sync ccomment asnComment
+
+" 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_asn_syn_inits")
+  if version < 508
+    let did_asn_syn_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+  HiLink asnDefinition	Function
+  HiLink asnBraces		Function
+  HiLink asnStructure	Statement
+  HiLink asnBoolValue	Boolean
+  HiLink asnSpecial		Special
+  HiLink asnString		String
+  HiLink asnCharacter	Character
+  HiLink asnSpecialCharacter	asnSpecial
+  HiLink asnNumber		asnValue
+  HiLink asnComment		Comment
+  HiLink asnLineComment	asnComment
+  HiLink asnType		Type
+  HiLink asnTypeInfo		PreProc
+  HiLink asnValue		Number
+  HiLink asnExternal		Include
+  HiLink asnTagModifier	Function
+  HiLink asnFieldOption	Type
+  delcommand HiLink
+endif
+
+let b:current_syntax = "asn"
+
+" vim: ts=8