diff --git a/VisualStudio/osgViewer/osgViewer.dsp b/VisualStudio/osgViewer/osgViewer.dsp
index b0a5fa50d..4e4efe0ea 100644
--- a/VisualStudio/osgViewer/osgViewer.dsp
+++ b/VisualStudio/osgViewer/osgViewer.dsp
@@ -203,7 +203,7 @@ SOURCE=..\..\Include\osgViewer\GraphicsWindow
 # End Source File
 # Begin Source File
 
-SOURCE=..\..\Include\osgViewer\GraphicsWindowWin32
+SOURCE=..\..\Include\osgViewer\api\Win32\GraphicsWindowWin32
 # End Source File
 # Begin Source File