diff --git a/examples/widgets/touch/knobs/doc/images/touch-knobs-example.png b/examples/widgets/touch/knobs/doc/images/touch-knobs-example.png
index 1cbd90d1013..7b75ff377c7 100644
Binary files a/examples/widgets/touch/knobs/doc/images/touch-knobs-example.png and b/examples/widgets/touch/knobs/doc/images/touch-knobs-example.png differ
diff --git a/examples/widgets/touch/knobs/main.cpp b/examples/widgets/touch/knobs/main.cpp
index 6f6910b4aef..74b64a99ebd 100644
--- a/examples/widgets/touch/knobs/main.cpp
+++ b/examples/widgets/touch/knobs/main.cpp
@@ -12,6 +12,7 @@ int main(int argc, char **argv)
 
     QGraphicsScene scene;
     QGraphicsView view(&scene);
+    view.setRenderHints(QPainter::Antialiasing);
 
     Knob *knob1 = new Knob;
     knob1->setPos(-110, 0);