diff --git a/examples/opengl/hellogl/window.cpp b/examples/opengl/hellogl/window.cpp
index 91a53a6..4da0693 100644
--- a/examples/opengl/hellogl/window.cpp
+++ b/examples/opengl/hellogl/window.cpp
@@ -44,8 +44,9 @@
 #include "window.h"
 
 //! [0]
-Window::Window()
+Window::Window() : QWidget(0, Qt::FramelessWindowHint)
 {
+    setAttribute(Qt::WA_TranslucentBackground);
     glWidget = new GLWidget;
 
     xSlider = createSlider();