diff --git a/examples/osgviewerQt/osgviewerQt.cpp b/examples/osgviewerQt/osgviewerQt.cpp
index e2e1f3fcc..ec4c302c4 100644
--- a/examples/osgviewerQt/osgviewerQt.cpp
+++ b/examples/osgviewerQt/osgviewerQt.cpp
@@ -105,6 +105,12 @@ int main( int argc, char** argv )
     while (arguments.read("--DrawThreadPerContext")) threadingModel = osgViewer::ViewerBase::DrawThreadPerContext;
     while (arguments.read("--CullThreadPerCameraDrawThreadPerContext")) threadingModel = osgViewer::ViewerBase::CullThreadPerCameraDrawThreadPerContext;
 
+#if QT_VERSION >= 0x040800
+    // Required for multithreaded QGLWidget on Linux/X11, see http://blog.qt.io/blog/2011/06/03/threaded-opengl-in-4-8/
+    if (threadingModel != osgViewer::ViewerBase::SingleThreaded)
+        QApplication::setAttribute(Qt::AA_X11InitThreads);
+#endif
+    
     QApplication app(argc, argv);
     ViewerWidget* viewWidget = new ViewerWidget(0, Qt::Widget, threadingModel);
     viewWidget->setGeometry( 100, 100, 800, 600 );