diff --git a/lib/generator.js b/lib/generator.js
index d5ede30..622dda7 100644
--- a/lib/generator.js
+++ b/lib/generator.js
@@ -18,7 +18,7 @@ module.exports = (function () {
   }
   
   function isBrowser () {
-    return typeof window == 'object';
+    return typeof window == 'object' && typeof window.location !== 'undefined';
   }
   
   function repeat (str, times) {