From 2e3aee25d9b1f13f76df64a32e1ffdb71b7313eb Mon Sep 17 00:00:00 2001
From: Matthew Taylor <mewtaylor@gmail.com>
Date: Thu, 1 Sep 2016 16:22:45 -0400
Subject: [PATCH] cover `undefined` case as well

thanks @rschamp!
---
 src/components/registration/steps.jsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/components/registration/steps.jsx b/src/components/registration/steps.jsx
index f8160079e..45e3064d9 100644
--- a/src/components/registration/steps.jsx
+++ b/src/components/registration/steps.jsx
@@ -91,7 +91,7 @@ module.exports = {
         },
         validateUsername: function (username, callback) {
             callback = callback || function () {};
-            if (username.length < 1) {
+            if (!username) {
                 this.refs.form.refs.formsy.updateInputsWithError({
                     'user.username': formatMessage({id: 'teacherRegistration.validationRequired'})
                 });