diff --git a/VisualStudio/osg/osg.dsp b/VisualStudio/osg/osg.dsp
index 4b84d6134..49523e671 100755
--- a/VisualStudio/osg/osg.dsp
+++ b/VisualStudio/osg/osg.dsp
@@ -179,6 +179,10 @@ SOURCE=..\..\src\osg\CopyOp.cpp
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\src\osg\ClusterCullingCallback.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\src\osg\CullFace.cpp
 # End Source File
 # Begin Source File
@@ -567,6 +571,10 @@ SOURCE=..\..\Include\Osg\CopyOp
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\Include\Osg\ClusterCullingCallback
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\Include\Osg\CullFace
 # End Source File
 # Begin Source File