From 4728ac0a4f121bbc3f8e34b403876ccedd997072 Mon Sep 17 00:00:00 2001
From: Norbert de Langen <ndelangen@me.com>
Date: Fri, 22 Feb 2019 11:36:11 +0100
Subject: [PATCH] FIX a11y setup being undefined

---
 addons/a11y/src/index.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/addons/a11y/src/index.js b/addons/a11y/src/index.js
index 8875e938a7bc..dd18397d73d5 100644
--- a/addons/a11y/src/index.js
+++ b/addons/a11y/src/index.js
@@ -9,7 +9,7 @@ import EVENTS, { PARAM_KEY } from './constants';
 
 const channel = addons.getChannel();
 let progress = Promise.resolve();
-let setup;
+let setup = {};
 
 const getElement = () => {
   const storyRoot = document.getElementById('story-root');
@@ -48,7 +48,7 @@ export const withA11Y = makeDecorator({
   allowDeprecatedUsage: false,
 
   wrapper: (getStory, context, opt) => {
-    setup = opt.parameters || opt.options;
+    setup = opt.parameters || opt.options || {};
 
     return getStory(context);
   },