diff --git a/lib/browser.js b/lib/browser.js
index c11cea9d..51d19792 100644
--- a/lib/browser.js
+++ b/lib/browser.js
@@ -1,4 +1,9 @@
-var _global = (function() { return this; })();
+var _global = (function () {
+	if (!this && typeof global !== 'undefined') {
+		return global;
+	}
+	return this;
+})();
 var NativeWebSocket = _global.WebSocket || _global.MozWebSocket;
 var websocket_version = require('./version');