diff --git a/include/osgSim/BlinkSequence b/include/osgSim/BlinkSequence
index fe88c8e97..9ec2ee1ab 100644
--- a/include/osgSim/BlinkSequence
+++ b/include/osgSim/BlinkSequence
@@ -25,7 +25,7 @@
 
 namespace osgSim {
 
-class OSGSIM_EXPORT BlinkSequence : public osg::Referenced
+class OSGSIM_EXPORT BlinkSequence : public osg::Object
 {
     public:
 
@@ -43,7 +43,9 @@ class OSGSIM_EXPORT BlinkSequence : public osg::Referenced
 
         BlinkSequence();
 
-        BlinkSequence(const BlinkSequence& bs);
+        BlinkSequence(const BlinkSequence& bs, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);
+        
+        META_Object(osgSim,BlinkSequence);
 
         
         /** add a pulse of specified color and duration to the BlinkSequence.*/
diff --git a/src/osgSim/BlinkSequence.cpp b/src/osgSim/BlinkSequence.cpp
index b444a0fbd..73152f54a 100644
--- a/src/osgSim/BlinkSequence.cpp
+++ b/src/osgSim/BlinkSequence.cpp
@@ -25,8 +25,8 @@ BlinkSequence::BlinkSequence():
 {
 }
 
-BlinkSequence::BlinkSequence(const BlinkSequence& bs):
-    osg::Referenced(),
+BlinkSequence::BlinkSequence(const BlinkSequence& bs, const osg::CopyOp& copyop):
+    osg::Object(bs,copyop),
     _pulsePeriod(bs._pulsePeriod),
     _phaseShift(bs._phaseShift),
     _pulseData(bs._pulseData),