diff --git a/examples/osgviewerWX/osgviewerWX.cpp b/examples/osgviewerWX/osgviewerWX.cpp
index aa6678638..bccd5cd23 100644
--- a/examples/osgviewerWX/osgviewerWX.cpp
+++ b/examples/osgviewerWX/osgviewerWX.cpp
@@ -64,6 +64,8 @@ bool wxOsgApp::OnInit()
     osgViewer::Viewer *viewer = new osgViewer::Viewer;
     viewer->getCamera()->setGraphicsContext(gw);
     viewer->getCamera()->setViewport(0,0,width,height);
+    viewer->getCamera()->setDrawBuffer(GL_BACK);
+    viewer->getCamera()->setReadBuffer(GL_BACK);
     viewer->addEventHandler(new osgViewer::StatsHandler);
     viewer->setThreadingModel(osgViewer::Viewer::SingleThreaded);