diff --git a/modules/highgui/src/window_QT.cpp b/modules/highgui/src/window_QT.cpp
index 3727a64e6..78bc77b3f 100755
--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -2511,7 +2511,7 @@ void ViewPort::scaleView(qreal factor,QPointF center)
 
 void ViewPort::wheelEvent(QWheelEvent *event)
 {
-	scaleView( -event->delta() / 240.0,event->pos());
+	scaleView( event->delta() / 240.0,event->pos());
 	viewport()->update();
 }