diff --git a/runtime/syntax/lotos.vim b/runtime/syntax/lotos.vim
new file mode 100644
index 0000000..3cd83c4
--- /dev/null
+++ b/runtime/syntax/lotos.vim
@@ -0,0 +1,82 @@
+" Vim syntax file
+" Language:	LOTOS (Language Of Temporal Ordering Specifications, IS8807)
+" Maintainer:	Daniel Amyot <damyot@csi.uottawa.ca>
+" Last Change:	Wed Aug 19 1998
+" URL:		http://lotos.csi.uottawa.ca/~damyot/vim/lotos.vim
+" This file is an adaptation of pascal.vim by Mario Eusebio
+" I'm not sure I understand all of the syntax highlight language,
+" but this file seems to do the job for standard LOTOS.
+
+" 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
+
+syn case ignore
+
+"Comments in LOTOS are between (* and *)
+syn region lotosComment	start="(\*"  end="\*)" contains=lotosTodo
+
+"Operators [], [...], >>, ->, |||, |[...]|, ||, ;, !, ?, :, =, ,, :=
+syn match  lotosDelimiter       "[][]"
+syn match  lotosDelimiter	">>"
+syn match  lotosDelimiter	"->"
+syn match  lotosDelimiter	"\[>"
+syn match  lotosDelimiter	"[|;!?:=,]"
+
+"Regular keywords
+syn keyword lotosStatement	specification endspec process endproc
+syn keyword lotosStatement	where behaviour behavior
+syn keyword lotosStatement      any let par accept choice hide of in
+syn keyword lotosStatement	i stop exit noexit
+
+"Operators from the Abstract Data Types in IS8807
+syn keyword lotosOperator	eq ne succ and or xor implies iff
+syn keyword lotosOperator	not true false
+syn keyword lotosOperator	Insert Remove IsIn NotIn Union Ints
+syn keyword lotosOperator	Minus Includes IsSubsetOf
+syn keyword lotosOperator	lt le ge gt 0
+
+"Sorts in IS8807
+syn keyword lotosSort		Boolean Bool FBoolean FBool Element
+syn keyword lotosSort		Set String NaturalNumber Nat HexString
+syn keyword lotosSort		HexDigit DecString DecDigit
+syn keyword lotosSort		OctString OctDigit BitString Bit
+syn keyword lotosSort		Octet OctetString
+
+"Keywords for ADTs
+syn keyword lotosType	type endtype library endlib sorts formalsorts
+syn keyword lotosType	eqns formaleqns opns formalopns forall ofsort is
+syn keyword lotosType   for renamedby actualizedby sortnames opnnames
+syn keyword lotosType   using
+
+syn sync lines=250
+
+" 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_lotos_syntax_inits")
+  if version < 508
+    let did_lotos_syntax_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+
+  HiLink lotosStatement		Statement
+  HiLink lotosProcess		Label
+  HiLink lotosOperator		Operator
+  HiLink lotosSort		Function
+  HiLink lotosType		Type
+  HiLink lotosComment		Comment
+  HiLink lotosDelimiter		String
+
+  delcommand HiLink
+endif
+
+let b:current_syntax = "lotos"
+
+" vim: ts=8