diff --git a/www/inappbrowser.js b/www/inappbrowser.js
index ebcfa24..3535b6f 100644
--- a/www/inappbrowser.js
+++ b/www/inappbrowser.js
@@ -90,6 +90,8 @@ module.exports = function(strUrl, strWindowName, strWindowFeatures) {
        iab._eventHandler(eventname);
     };
 
+    strWindowFeatures = strWindowFeatures || "";
+
     exec(cb, cb, "InAppBrowser", "open", [strUrl, strWindowName, strWindowFeatures]);
     return iab;
 };