diff --git a/runtime/syntax/taskdata.vim b/runtime/syntax/taskdata.vim
index 79186e0..b37c70c 100644
--- a/runtime/syntax/taskdata.vim
+++ b/runtime/syntax/taskdata.vim
@@ -11,6 +11,8 @@
 elseif exists("b:current_syntax")
   finish
 endif
+let s:keepcpo= &cpo
+set cpo&vim
 
 " Key Names for values.
 syn keyword taskdataKey		description due end entry imask mask parent
@@ -40,4 +42,7 @@
 
 let b:current_syntax = "taskdata"
 
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
 " vim:noexpandtab