diff --git a/examples/opengl/paintedwindow/main.cpp b/examples/opengl/paintedwindow/main.cpp
index 270b0b162ae..b0c00603381 100644
--- a/examples/opengl/paintedwindow/main.cpp
+++ b/examples/opengl/paintedwindow/main.cpp
@@ -50,6 +50,6 @@ int main(int argc, char **argv)
     PaintedWindow window;
     window.show();
 
-    app.exec();
+    return app.exec();
 }