diff --git a/source/UI/js/Core/Event.js b/source/UI/js/Core/Event.js
index 8df1650a..31c1fee8 100644
--- a/source/UI/js/Core/Event.js
+++ b/source/UI/js/Core/Event.js
@@ -438,7 +438,7 @@
             Ox.forEach(
                 Ox.makeObject(Ox.slice(arguments)),
                 function(data, event) {
-                    target.postMessage(JSON.stringify({
+                    target && target.postMessage(JSON.stringify({
                         data: data,
                         event: event,
                         target: isParent ? Ox.oxid : null