diff --git a/runtime/ftplugin/xml.vim b/runtime/ftplugin/xml.vim
index 74cd064..236e870 100644
--- a/runtime/ftplugin/xml.vim
+++ b/runtime/ftplugin/xml.vim
@@ -61,3 +61,4 @@
 
 " Restore the saved compatibility options.
 let &cpo = s:save_cpo
+unlet s:save_cpo