diff --git a/runtime/indent/zimbu.vim b/runtime/indent/zimbu.vim
index a01510d..8df0eeb 100644
--- a/runtime/indent/zimbu.vim
+++ b/runtime/indent/zimbu.vim
@@ -1,7 +1,7 @@
 " Vim indent file
 " Language:	Zimbu
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2012 May 17
+" Last Change:	2011 Jun 19
 
 " Only load this indent file when no other was loaded.
 if exists("b:did_indent")
@@ -16,13 +16,16 @@
 " We impose recommended defaults: no Tabs, 'shiftwidth' = 2
 setlocal sw=2 et
 
-let b:undo_indent = "setl et< ai< indentexpr="
+let b:undo_indent = "setl et< sw< ai< indentkeys< indentexpr="
 
 " Only define the function once.
 if exists("*GetZimbuIndent")
   finish
 endif
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 " Come here when loading the script the first time.
 
 let s:maxoff = 50	" maximum number of lines to look backwards for ()
@@ -121,3 +124,5 @@
   return plindent
 endfunc
 
+let &cpo = s:cpo_save
+unlet s:cpo_save