From b94b4b335bc20748de3620ef430bab21fd2b35ee Mon Sep 17 00:00:00 2001
From: Alberto Leal <Dashed@users.noreply.github.com>
Date: Wed, 17 Dec 2014 04:18:53 -0500
Subject: [PATCH] Clarify usage of 6to5 in node with harmony flag.

---
 doc/usage.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/doc/usage.md b/doc/usage.md
index 23119e367b..550706a5a4 100644
--- a/doc/usage.md
+++ b/doc/usage.md
@@ -184,6 +184,8 @@ require("6to5/register")({
 });
 ```
 
+**NOTE:** Be aware that if you use node.js with the `--harmony` flag, 6to5 will not automatically check and disable features that are natively supported. You will need to use the `blacklist` option.
+
 #### Options
 
 ```javascript