From 46552e7c45025c76e3f647680d7539a66bfac612 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jose=CC=81=20F=2E=20Romaniello?= <jfromaniello@gmail.com>
Date: Mon, 4 Jan 2016 12:43:10 -0300
Subject: [PATCH] minor

---
 index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index ba486fb..221dba2 100644
--- a/index.js
+++ b/index.js
@@ -61,7 +61,9 @@ JWT.sign = function(payload, secretOrPrivateKey, options, callback) {
       return typeof options[key] !== 'undefined';
     })[0];
 
-    console.warn('invalid "' + invalid_option + '" option for ' + (typeof payload) + ' payload');
+    if (invalid_option) {
+      console.warn('invalid "' + invalid_option + '" option for ' + (typeof payload) + ' payload');
+    }
   }