diff --git a/src/polyfills.js b/src/polyfills.js
index 295898a6c19..d3695134ed5 100644
--- a/src/polyfills.js
+++ b/src/polyfills.js
@@ -1,2 +1,5 @@
 // Promise global, Used ( at least ) by 'whatwg-fetch'. And required by IE 11
-require("core-js/fn/promise")
+
+if(!window.Promise) {
+  require("core-js/fn/promise")
+}