diff --git a/components/sceneutil/unrefqueue.cpp b/components/sceneutil/unrefqueue.cpp
index 10d568298..238da0971 100644
--- a/components/sceneutil/unrefqueue.cpp
+++ b/components/sceneutil/unrefqueue.cpp
@@ -2,7 +2,6 @@
 
 #include <deque>
 
-#include <osg/Object>
 //#include <osg/Timer>
 //#include <iostream>
 
@@ -14,7 +13,7 @@ namespace SceneUtil
     class UnrefWorkItem : public SceneUtil::WorkItem
     {
     public:
-        std::deque<osg::ref_ptr<const osg::Object> > mObjects;
+        std::deque<osg::ref_ptr<const osg::Referenced> > mObjects;
 
         virtual void doWork()
         {
@@ -30,7 +29,7 @@ namespace SceneUtil
         mWorkItem = new UnrefWorkItem;
     }
 
-    void UnrefQueue::push(const osg::Object *obj)
+    void UnrefQueue::push(const osg::Referenced *obj)
     {
         mWorkItem->mObjects.push_back(obj);
     }
diff --git a/components/sceneutil/unrefqueue.hpp b/components/sceneutil/unrefqueue.hpp
index 85b1d31e1..4e5293956 100644
--- a/components/sceneutil/unrefqueue.hpp
+++ b/components/sceneutil/unrefqueue.hpp
@@ -4,11 +4,6 @@
 #include <osg/ref_ptr>
 #include <osg/Referenced>
 
-namespace osg
-{
-    class Object;
-}
-
 namespace SceneUtil
 {
     class WorkQueue;
@@ -22,7 +17,7 @@ namespace SceneUtil
         UnrefQueue();
 
         /// Adds an object to the list of objects to be unreferenced. Call from the main thread.
-        void push(const osg::Object* obj);
+        void push(const osg::Referenced* obj);
 
         /// Adds a WorkItem to the given WorkQueue that will clear the list of objects in a worker thread, thus unreferencing them.
         /// Call from the main thread.