diff --git a/examples/opengl/hellowindow/hellowindow.cpp b/examples/opengl/hellowindow/hellowindow.cpp
index 380ddcc702..b7b3d2b10e 100644
--- a/examples/opengl/hellowindow/hellowindow.cpp
+++ b/examples/opengl/hellowindow/hellowindow.cpp
@@ -80,6 +80,8 @@ HelloWindow::HelloWindow(Renderer *renderer)
 
 void HelloWindow::exposeEvent(QExposeEvent *event)
 {
+    Q_UNUSED(event);
+
     render();
 
     QTimer *timer = new QTimer(this);