diff --git a/lib/webworker-child.js b/lib/webworker-child.js
index 34b3c9f..e83a272 100644
--- a/lib/webworker-child.js
+++ b/lib/webworker-child.js
@@ -132,7 +132,8 @@ ws.addListener('open', function() {
 var scriptObj = undefined;
 switch (scriptLoc.protocol) {
 case 'file':
-    scriptObj = new script.Script(
+	var script_function = script.Script || script.NodeScript;
+    scriptObj = new script_function(
         fs.readFileSync(scriptLoc.pathname),
         scriptLoc.href
     );