diff --git a/src/index.js b/src/index.js
index b27cda4..f705a7f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,4 +1,4 @@
-if (!window._babelPolyfill) {
+if (!global._babelPolyfill) {
   require('babel-polyfill');
 }
 import API from './functions/api';