diff --git a/src/osg/Camera.cpp b/src/osg/Camera.cpp
index 2e0fd2457..d381aa304 100644
--- a/src/osg/Camera.cpp
+++ b/src/osg/Camera.cpp
@@ -33,7 +33,7 @@ Camera::Camera()
     _screenDistance = 1.0f;
 }
 
-Camera::Camera(const Camera& camera)
+Camera::Camera(const Camera& camera):Referenced()
 {
     copy(camera);
 }