diff --git a/lib/util.js b/lib/util.js
index b17d8351..07ee7703 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -37,7 +37,7 @@ var util = {
   },
 
   // IBM required for generic JS framework support
-  isBrowser: function isBrowser() { return process && process.browser; },
+  isBrowser: function isBrowser() { return typeof window !== "undefined"; },
   isNode: function isNode() { return !util.isBrowser(); },
 
   uriEscape: function uriEscape(string) {