diff --git a/runtime/indent/ada.vim b/runtime/indent/ada.vim
index a9b461c..c7f8864 100644
--- a/runtime/indent/ada.vim
+++ b/runtime/indent/ada.vim
@@ -28,6 +28,8 @@
 if exists("b:did_indent") || version < 700
    finish
 endif
+let s:keepcpo= &cpo
+set cpo&vim
 
 let b:did_indent = 45
 
@@ -292,6 +294,9 @@
    return ind
 endfunction GetAdaIndent
 
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
 finish " 1}}}
 
 "------------------------------------------------------------------------------