diff --git a/README.md b/README.md
index c6cab57..6e2faf0 100644
--- a/README.md
+++ b/README.md
@@ -183,7 +183,7 @@ command! -bang Colors
   \ call fzf#vim#colors({'left': '15%', 'options': '--reverse --margin 30%,0'}, <bang>0)
 
 " Augmenting Ag command using fzf#vim#with_preview function
-"   * fzf#vim#with_preview([[options], preview window, [toggle keys...]])
+"   * fzf#vim#with_preview([[options], [preview window], [toggle keys...]])
 "     * For syntax-highlighting, Ruby and any of the following tools are required:
 "       - Bat: https://github.com/sharkdp/bat
 "       - Highlight: http://www.andre-simon.de/doku/highlight/en/highlight.php
diff --git a/autoload/fzf/vim.vim b/autoload/fzf/vim.vim
index cd8703d..22ca98d 100644
--- a/autoload/fzf/vim.vim
+++ b/autoload/fzf/vim.vim
@@ -74,7 +74,7 @@ function! s:prepend_opts(dict, eopts)
   return s:extend_opts(a:dict, a:eopts, 1)
 endfunction
 
-" [[options to wrap], preview window expression, [toggle-preview keys...]]
+" [[options to wrap], [preview window expression], [toggle-preview keys...]]
 function! fzf#vim#with_preview(...)
   " Default options
   let options = {}
diff --git a/doc/fzf-vim.txt b/doc/fzf-vim.txt
index 205dd2c..457e8a4 100644
--- a/doc/fzf-vim.txt
+++ b/doc/fzf-vim.txt
@@ -228,7 +228,7 @@ You can use autoload functions to define your own commands.
       \ call fzf#vim#colors({'left': '15%', 'options': '--reverse --margin 30%,0'}, <bang>0)
 
     " Augmenting Ag command using fzf#vim#with_preview function
-    "   * fzf#vim#with_preview([[options], preview window, [toggle keys...]])
+    "   * fzf#vim#with_preview([[options], [preview window], [toggle keys...]])
     "     * For syntax-highlighting, Ruby and any of the following tools are required:
     "       - Highlight: http://www.andre-simon.de/doku/highlight/en/highlight.php
     "       - CodeRay: http://coderay.rubychan.de/