diff --git a/src/osgSim/OverlayNode.cpp b/src/osgSim/OverlayNode.cpp
index aa811fdb3..16ffb7a55 100644
--- a/src/osgSim/OverlayNode.cpp
+++ b/src/osgSim/OverlayNode.cpp
@@ -846,6 +846,7 @@ OverlayNode::OverlayNode(const OverlayNode& copy, const osg::CopyOp& copyop):
     _overlayClearColor(copy._overlayClearColor),
     _continuousUpdate(copy._continuousUpdate),
     _overlayBaseHeight(copy._overlayBaseHeight),
+    _updateCamera(false),
     _renderTargetImpl(copy._renderTargetImpl)
 {
     setNumChildrenRequiringUpdateTraversal(getNumChildrenRequiringUpdateTraversal()+1);