diff --git a/autoload/zencoding.vim b/autoload/zencoding.vim
index a696143..5e490ea 100644
--- a/autoload/zencoding.vim
+++ b/autoload/zencoding.vim
@@ -1,7 +1,7 @@
 "=============================================================================
 " zencoding.vim
 " Author: Yasuhiro Matsumoto <mattn.jp@gmail.com>
-" Last Change: 09-Apr-2013.
+" Last Change: 23-Apr-2013.
 
 let s:save_cpo = &cpo
 set cpo&vim
@@ -198,7 +198,7 @@ function! zencoding#toString(...)
         if len(current.value)
           let text = current.value[1:-2]
           if dollar_expr
-            let text = substitute(text, '\%(\\\)\@\<!\(\$\+\)\([^{#]\|$\)', '\=printf("%0".len(submatch(1))."d", itemno+1).submatch(2)', 'g')
+            let text = substitute(text, '\%(\\\)\@\<!\(\$\+\)\([^{#]\|$\)', '\=printf("%0".len(submatch(1))."d", max([itemno, group_itemno])+1).submatch(2)', 'g')
             let text = substitute(text, '\${nr}', "\n", 'g')
             let text = substitute(text, '\\\$', '$', 'g')
           endif