diff --git a/src/osgGLUT/Viewer.cpp b/src/osgGLUT/Viewer.cpp
index 58cd61153..93046ca3e 100644
--- a/src/osgGLUT/Viewer.cpp
+++ b/src/osgGLUT/Viewer.cpp
@@ -332,10 +332,6 @@ float Viewer::app(unsigned int viewport)
 {
     osg::Timer_t beforeApp = _timer.tick();
 
-    // do app traversal.
-    
-    getViewportSceneView(viewport)->setFrameStamp(_frameStamp.get());
-    getViewportSceneView(viewport)->app();
 
     // update the camera manipulator.
     osg::ref_ptr<GLUTEventAdapter> ea = new GLUTEventAdapter;
@@ -346,6 +342,11 @@ float Viewer::app(unsigned int viewport)
         //        osg::notify(osg::INFO) << "Handled update frame"<<endl;
     }
 
+    // do app traversal.
+    
+    getViewportSceneView(viewport)->setFrameStamp(_frameStamp.get());
+    getViewportSceneView(viewport)->app();
+
     osg::Timer_t beforeCull = _timer.tick();
 
     return  _timer.delta_m(beforeApp,beforeCull);