diff --git a/src/gui/tracks/TrackView.cpp b/src/gui/tracks/TrackView.cpp
index 08ad01c9c..e23236021 100644
--- a/src/gui/tracks/TrackView.cpp
+++ b/src/gui/tracks/TrackView.cpp
@@ -393,17 +393,18 @@ void TrackView::mouseReleaseEvent( QMouseEvent * me )
 
 void TrackView::wheelEvent(QWheelEvent* we)
 {
-	we->accept();
-	
-	const int deltaY = we->angleDelta().y();
+	// Note: we add the values because one of them will be 0. If the alt modifier
+	// is pressed x is non-zero and otherwise y.
+	const int deltaY = we->angleDelta().x() + we->angleDelta().y();
 	int const direction = deltaY < 0 ? -1 : 1;
 
 	auto const modKeys = we->modifiers();
-	int stepSize = modKeys == Qt::ControlModifier ? 1 : modKeys == Qt::ShiftModifier ? 5 : 0;
+	int stepSize = modKeys == (Qt::ControlModifier | Qt::AltModifier) ? 1 : modKeys == (Qt::ShiftModifier | Qt::AltModifier) ? 5 : 0;
 
 	if (stepSize != 0)
 	{
 		resizeToHeight(height() + stepSize * direction);
+		we->accept();
 	}
 }