diff --git a/lib/devices/ios/ios-controller.js b/lib/devices/ios/ios-controller.js
index fd335535e..8af17645b 100644
--- a/lib/devices/ios/ios-controller.js
+++ b/lib/devices/ios/ios-controller.js
@@ -235,7 +235,7 @@ iOSController.getSourceForElementForXML = function (ctx, cb) {
     if (err) return cb(err);
     // TODO: all this json/xml logic is very expensive, we need
     // to use a SAX parser instead.
-    if (res.value) res.value = JSON.stringify(res.value);
+    if (res && res.value) res.value = JSON.stringify(res.value);
     _cb(err, res);
   };
   if (!ctx) {