diff --git a/autoload/gundo.vim b/autoload/gundo.vim
index 73a53e9..df9cc64 100644
--- a/autoload/gundo.vim
+++ b/autoload/gundo.vim
@@ -114,6 +114,7 @@ function! s:GundoMapGraph()"{{{
     nnoremap <script> <silent> <buffer> gg            gg:call <sid>GundoMove(1)<CR>
     nnoremap <script> <silent> <buffer> P             :call <sid>GundoPlayTo()<CR>
     nnoremap <script> <silent> <buffer> p             :call <sid>GundoRenderChangePreview()<CR>
+    nnoremap <script> <silent> <buffer> r             :call <sid>GundoRenderPreview()<CR>
     nnoremap <script> <silent> <buffer> q             :call <sid>GundoClose()<CR>
     cabbrev  <script> <silent> <buffer> q             call <sid>GundoClose()
     cabbrev  <script> <silent> <buffer> quit          call <sid>GundoClose()
diff --git a/doc/gundo.txt b/doc/gundo.txt
index 82f5bc2..46d9c47 100644
--- a/doc/gundo.txt
+++ b/doc/gundo.txt
@@ -238,6 +238,7 @@ GitHub: http://github.com/sjl/gundo.vim/
 7. Changelog                                                  *GundoChangelog*
 v2.3.1
     * Add auto preview option.
+    * Add 'r' mapping to preview current state.
 v2.3.0
     * Add statusline configuration.
 v2.2.2