Index: src/FileSystemJsObject.cpp
===================================================================
--- a/src/FileSystemJsObject.cpp
+++ b/src/FileSystemJsObject.cpp
@@ -344,18 +344,18 @@
     std::string resolved = jsEngine->GetFileSystem()->Resolve(converted[0]->AsString());
 
     return Utils::ToV8String(isolate, resolved);
   }
 
 }
 
 
-JsValuePtr FileSystemJsObject::Setup(JsEngine& jsEngine, const JsValuePtr& obj)
+JsValue& FileSystemJsObject::Setup(JsEngine& jsEngine, JsValue& obj)
 {
-  obj->SetProperty("read", jsEngine.NewCallback(::ReadCallback));
-  obj->SetProperty("write", jsEngine.NewCallback(::WriteCallback));
-  obj->SetProperty("move", jsEngine.NewCallback(::MoveCallback));
-  obj->SetProperty("remove", jsEngine.NewCallback(::RemoveCallback));
-  obj->SetProperty("stat", jsEngine.NewCallback(::StatCallback));
-  obj->SetProperty("resolve", jsEngine.NewCallback(::ResolveCallback));
+  obj.SetProperty("read", *jsEngine.NewCallback(::ReadCallback));
+  obj.SetProperty("write", *jsEngine.NewCallback(::WriteCallback));
+  obj.SetProperty("move", *jsEngine.NewCallback(::MoveCallback));
+  obj.SetProperty("remove", *jsEngine.NewCallback(::RemoveCallback));
+  obj.SetProperty("stat", *jsEngine.NewCallback(::StatCallback));
+  obj.SetProperty("resolve", *jsEngine.NewCallback(::ResolveCallback));
   return obj;
 }