diff --git a/runtime/ftplugin/initex.vim b/runtime/ftplugin/initex.vim
index 4f35d04..0ee3e8d 100644
--- a/runtime/ftplugin/initex.vim
+++ b/runtime/ftplugin/initex.vim
@@ -34,5 +34,6 @@
 setlocal suffixesadd=.tex
 
 let &cpo = s:save_cpo
+unlet s:save_cpo
 
 " vim:sts=2:sw=2: