diff --git a/packages/babel-polyfill/src/index.js b/packages/babel-polyfill/src/index.js
index 352aba3ae7..5ff627aeb6 100644
--- a/packages/babel-polyfill/src/index.js
+++ b/packages/babel-polyfill/src/index.js
@@ -12,8 +12,9 @@ import "babel-regenerator-runtime";
 
 import "core-js/fn/regexp/escape";
 
+let DEFINE_PROPERTY = "defineProperty";
 function define(O, key, value){
-  O[key] || Object.defineProperty(O, key, {
+  O[key] || Object[DEFINE_PROPERTY](O, key, {
     writable:     true,
     configurable: true,
     value:        value