diff --git a/lib/browser.js b/lib/browser.js
index 83c586b..c16dff6 100644
--- a/lib/browser.js
+++ b/lib/browser.js
@@ -9,7 +9,7 @@ var after = require('after');
 var utf8 = require('wtf-8');
 
 var base64encoder;
-if (global.ArrayBuffer) {
+if (global&&global.ArrayBuffer) {
   base64encoder = require('base64-arraybuffer');
 }