diff --git a/VisualStudio/osg/osg.dsp b/VisualStudio/osg/osg.dsp
index e9bd508d4..5c4883b85 100755
--- a/VisualStudio/osg/osg.dsp
+++ b/VisualStudio/osg/osg.dsp
@@ -737,10 +737,6 @@ SOURCE=..\..\Include\Osg\MatrixTransform
 # End Source File
 # Begin Source File
 
-SOURCE=..\..\include\osg\mem_ptr
-# End Source File
-# Begin Source File
-
 SOURCE=..\..\include\osg\Multisample
 # End Source File
 # Begin Source File