diff --git a/src/node-polyfill.js b/src/node-polyfill.js
index f0c477c6..0290c2a8 100644
--- a/src/node-polyfill.js
+++ b/src/node-polyfill.js
@@ -1,6 +1,5 @@
-const fetchNode = require('./node-ponyfill')
-
 if (!global.fetch) {
+  const fetchNode = require('./node-ponyfill')
   const fetch = fetchNode.fetch.bind({})
 
   global.fetch = fetch