diff --git a/include/osg/GraphicsContext b/include/osg/GraphicsContext
index 2fc0cec33..6b621f2a6 100644
--- a/include/osg/GraphicsContext
+++ b/include/osg/GraphicsContext
@@ -124,6 +124,8 @@ class OSG_EXPORT GraphicsContext : public Object
             
             // shared context
             GraphicsContext* sharedContext;
+            
+            osg::ref_ptr<osg::Referenced> inhertedWindowData;
         };