diff --git a/runtime/syntax/ada.vim b/runtime/syntax/ada.vim
index 4f04bd0..c9d2b06 100644
--- a/runtime/syntax/ada.vim
+++ b/runtime/syntax/ada.vim
@@ -32,6 +32,8 @@
 if exists("b:current_syntax") || version < 700
     finish
 endif
+let s:keepcpo= &cpo
+set cpo&vim
 
 let b:current_syntax = "ada"
 
@@ -352,6 +354,9 @@
 " this speeds things up greatly.
 syntax sync minlines=1 maxlines=1
 
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
 finish " 1}}}
 
 "------------------------------------------------------------------------------