diff --git a/runtime/ftplugin/config.vim b/runtime/ftplugin/config.vim
index df607b1..7fde42e 100644
--- a/runtime/ftplugin/config.vim
+++ b/runtime/ftplugin/config.vim
@@ -39,3 +39,4 @@
 
 " Restore the saved compatibility options.
 let &cpo = s:save_cpo
+unlet s:save_cpo