diff --git a/randombytes.js b/randombytes.js
index 5d6f442..c497ec3 100644
--- a/randombytes.js
+++ b/randombytes.js
@@ -20,7 +20,7 @@ var randombytes = (function () {
 
   if (crypto && crypto.getRandomValues) return browserBytes
 
-  if (require != null) {
+  if (typeof require === 'function') {
     // Node.js. Bust Browserify
     crypto = require('cry' + 'pto')
     if (crypto && crypto.randomBytes) return nodeBytes