diff --git a/README.markdown b/README.markdown
index e9bb313..bfae5c6 100644
--- a/README.markdown
+++ b/README.markdown
@@ -80,7 +80,10 @@ A. Stick this in your vimrc: `autocmd vimenter * NERDTree`
 
 __Q. How can I open a NERDTree automatically when vim starts up if no files were specified?__
 
-A. Stick this in your vimrc `autocmd vimenter * if !argc() | NERDTree | endif`
+A. Stick this in your vimrc
+
+    autocmd StdinReadPre * let s:std_in=1
+    autocmd VimEnter * if !argc() == 0 && !exists("s:std_in") | NERDTree | endif
 
 __Q. How can I map a specific key or shortcut to open NERDTree?__