diff --git a/lib/6to5/polyfill.js b/lib/6to5/polyfill.js
index 64c1a40fe2..84971c3dea 100644
--- a/lib/6to5/polyfill.js
+++ b/lib/6to5/polyfill.js
@@ -1,3 +1,3 @@
 require("es6-symbol/implement");
 require("es6-shim");
-global.regeneratorRuntime = require("regenerator/runtime");
+require("regenerator").runtime();