diff --git a/tutorial.md b/tutorial.md
index c839411..9d612a3 100644
--- a/tutorial.md
+++ b/tutorial.md
@@ -38,14 +38,14 @@ Installing plugins
 With vim-plug, you declare the list of plugins you want to use in your
 Vim configuration file. It's `~/.vimrc` for ordinary Vim, and
 `~/.config/nvim/init.vim` for Neovim. The list should start with
-`call plug#begin(PLUGIN_DIRECTORY)` and end with `call plug#end()`.
+`call plug#begin([PLUGIN_DIRECTORY])` and end with `call plug#end()`.
 `PLUGIN_DIRECTORY` is a placeholder for vim-plug's plugin directory.
 Please do not set it to a directory from `runtimepath` option.
 Do NOT set it to the `autoload/` directory where `plug.vim` is.
 
 ```vim
-" Plugins will be downloaded under the specified directory.
-call plug#begin(has('nvim') ? stdpath('data') . '/plugged' : '~/.vim/plugged')
+" Plugin directory is optional
+call plug#begin()
 
 " Declare the list of plugins.
 Plug 'tpope/vim-sensible'