diff --git a/contrib/vim/syntax/chaiscript.vim b/contrib/vim/syntax/chaiscript.vim
index e78b4c1..b442aaa 100644
--- a/contrib/vim/syntax/chaiscript.vim
+++ b/contrib/vim/syntax/chaiscript.vim
@@ -7,6 +7,9 @@ if exists("b:current_syntax")
   finish
 end
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 syn case match
 
 " syncing method
@@ -16,11 +19,11 @@ syn sync fromstart
 syn region chaiscriptString        start=+"+ end=+"+ skip=+\\\\\|\\"+ contains=chaiscriptSpecial,chaiscriptEval,@Spell
 
 " Escape characters
-syn match  chaiscriptSpecial       contained "\\[\\abfnrtv\'\"]\|\\\d\{,3}" 
+syn match  chaiscriptSpecial       contained "\\[\\abfnrtv\'\"]\|\\\d\{,3}"
 
 " String evals
-syn region chaiscriptEval          contained start="${" end="}" 
- 
+syn region chaiscriptEval          contained start="${" end="}"
+
 " integer number
 syn match  chaiscriptNumber        "\<\d\+\>"
 
@@ -91,4 +94,6 @@ hi def link chaiscriptEval	        Special
 
 let b:current_syntax = "chaiscript"
 
+let &cpo = s:cpo_save
+unlet s:cpo_save
 " vim: nowrap sw=2 sts=2 ts=8 noet