diff --git a/plugins/dde-dock/brightness/brightnessapplet.cpp b/plugins/dde-dock/brightness/brightnessapplet.cpp
index 48d70fd7e..6c5bcb1ee 100644
--- a/plugins/dde-dock/brightness/brightnessapplet.cpp
+++ b/plugins/dde-dock/brightness/brightnessapplet.cpp
@@ -113,7 +113,9 @@ void BrightnessApplet::addMonitor(Monitor *monitor)
     auto container = new SliderContainer(this);
     container->setFixedHeight(SLIDER_ITEM_HEIGHT);
     container->addBackground();
-    container->setSlider(new Dtk::Widget::DSlider);
+    auto dSlider = new Dtk::Widget::DSlider();
+    dSlider->setMouseWheelEnabled(true);
+    container->setSlider(dSlider);
     container->setRange(BrightnessModel::ref().minBrightness(), BrightnessModel::ref().maxBrightness());
     container->setTip(monitor->name(), SliderContainer::LeftTip);
     container->setTip(QString::number(monitor->brightness() * 100) + "%", SliderContainer::RightTip);
diff --git a/plugins/dde-dock/common/dockslider.cpp b/plugins/dde-dock/common/dockslider.cpp
index 5b93c535a..bc2607ea7 100644
--- a/plugins/dde-dock/common/dockslider.cpp
+++ b/plugins/dde-dock/common/dockslider.cpp
@@ -15,7 +15,7 @@ DockSlider::DockSlider(QWidget *parent)
 {
     setPageStep(50);
     m_timer->setInterval(100);
-
+    setMouseWheelEnabled(true);
     connect(m_timer, &QTimer::timeout, this, &DockSlider::onTimeout);
 }