diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index cd05c35de..da889bc18 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -1138,8 +1138,10 @@ void CullVisitor::apply(osg::Camera& camera)
     }
 
 
+    if (camera.getViewport()) pushViewport(camera.getViewport());
+
     pushProjectionMatrix(projection);
-    pushModelViewMatrix(modelview, camera.getReferenceFrame());
+    pushModelViewMatrix(modelview, camera.getReferenceFrame());    
 
 
     if (camera.getRenderOrder()==osg::Camera::NESTED_RENDER)
@@ -1273,6 +1275,8 @@ void CullVisitor::apply(osg::Camera& camera)
     // restore the previous model view matrix.
     popProjectionMatrix();
 
+    if (camera.getViewport()) popViewport();
+
     // restore the previous cull settings
     setCullSettings(saved_cull_settings);