diff --git a/plugin/zencoding.vim b/plugin/zencoding.vim
index a67b0f4..62d9eb8 100644
--- a/plugin/zencoding.vim
+++ b/plugin/zencoding.vim
@@ -66,6 +66,14 @@
 " GetLatestVimScripts: 2981 1 :AutoInstall: zencoding.vim
 " script type: plugin
 
+if &cp || (exists('g:loaded_zencoding_vim') && g:loaded_zencoding_vim)
+  finish
+endif
+let g:loaded_zencoding_vim = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
 if !exists('g:zencoding_debug')
   let g:zencoding_debug = 0
 endif
@@ -123,4 +131,7 @@ function! s:install_plugin()
 endfunction
 call s:install_plugin()
 
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
 " vim:set et: