2 files changed, 4 insertions, 0 deletions
diff --git a/examples/threads/mandelbrot/mandelbrotwidget.cpp b/examples/threads/mandelbrot/mandelbrotwidget.cpp
index c1ec029548..3a10a7a726 100644
--- a/examples/threads/mandelbrot/mandelbrotwidget.cpp
+++ b/examples/threads/mandelbrot/mandelbrotwidget.cpp
@@ -162,6 +162,7 @@ void MandelbrotWidget::keyPressEvent(QKeyEvent *event)
 }
 //! [11]
 
+#ifndef QT_NO_WHEELEVENT
 //! [12]
 void MandelbrotWidget::wheelEvent(QWheelEvent *event)
 {
@@ -170,6 +171,7 @@ void MandelbrotWidget::wheelEvent(QWheelEvent *event)
     zoom(pow(ZoomInFactor, numSteps));
 }
 //! [12]
+#endif
 
 //! [13]
 void MandelbrotWidget::mousePressEvent(QMouseEvent *event)
diff --git a/examples/threads/mandelbrot/mandelbrotwidget.h b/examples/threads/mandelbrot/mandelbrotwidget.h
index ea5fdc53c1..238a2bdca1 100644
--- a/examples/threads/mandelbrot/mandelbrotwidget.h
+++ b/examples/threads/mandelbrot/mandelbrotwidget.h
@@ -58,7 +58,9 @@ protected:
     void paintEvent(QPaintEvent *event);
     void resizeEvent(QResizeEvent *event);
     void keyPressEvent(QKeyEvent *event);
+#ifndef QT_NO_WHEELEVENT
     void wheelEvent(QWheelEvent *event);
+#endif
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);