diff --git a/README.markdown b/README.markdown
index 879d96d..6efeb0b 100644
--- a/README.markdown
+++ b/README.markdown
@@ -21,7 +21,7 @@ Installation
 
     git clone https://github.com/scrooloose/nerdtree.git ~/.vim/bundle/nerdtree
 
-Then reload Vim, run `:helptags ~/.vim/bundle/nerdtree/doc/`, and check out `:help NERDTree.txt`.
+Then reload Vim, run `:helptags ~/.vim/bundle/nerdtree/doc/` or `:Helptags`, and check out `:help NERDTree.txt`.
 
 
 #### [apt-vim](https://github.com/egalpin/apt-vim)