diff --git a/src/widgets/dialogs/qsidebar.cpp b/src/widgets/dialogs/qsidebar.cpp
index 9dcc6e35ff5..17670ab6e3c 100644
--- a/src/widgets/dialogs/qsidebar.cpp
+++ b/src/widgets/dialogs/qsidebar.cpp
@@ -197,8 +197,11 @@ void QUrlModel::setUrl(const QModelIndex &index, const QUrl &url, const QModelIn
         // Make sure that we have at least 32x32 images
             const QSize size = newIcon.actualSize(QSize(32,32));
             if (size.width() < 32) {
-                QPixmap smallPixmap = newIcon.pixmap(QSize(32, 32));
-                newIcon.addPixmap(smallPixmap.scaledToWidth(32, Qt::SmoothTransformation));
+                const auto widget = qobject_cast<QWidget *>(parent());
+                const auto dpr = widget ? widget->devicePixelRatio() : qApp->devicePixelRatio();
+                const auto smallPixmap = newIcon.pixmap(QSize(32, 32), dpr);
+                const auto newPixmap = smallPixmap.scaledToWidth(32 * dpr, Qt::SmoothTransformation);
+                newIcon.addPixmap(newPixmap);
             }
         }
 
diff --git a/src/widgets/dialogs/qwizard_win.cpp b/src/widgets/dialogs/qwizard_win.cpp
index 2c4f049e888..64447f9728f 100644
--- a/src/widgets/dialogs/qwizard_win.cpp
+++ b/src/widgets/dialogs/qwizard_win.cpp
@@ -251,7 +251,7 @@ void QVistaHelper::drawTitleBar(QPainter *painter)
 
         const QPoint pos(origin.x() + iconLeft, origin.y() + verticalCenter - size / 2);
         const QPoint posDp = pos * QVistaHelper::m_devicePixelRatio;
-        const HICON hIcon = qt_pixmapToWinHICON(windowIcon.pixmap(size * QVistaHelper::m_devicePixelRatio));
+        const HICON hIcon = qt_pixmapToWinHICON(windowIcon.pixmap(QSize(size, size), QVistaHelper::m_devicePixelRatio));
         DrawIconEx(hdc, posDp.x(), posDp.y(), hIcon, 0, 0, 0, NULL, DI_NORMAL | DI_COMPAT);
         DestroyIcon(hIcon);
     }
diff --git a/src/widgets/widgets/qmdisubwindow.cpp b/src/widgets/widgets/qmdisubwindow.cpp
index 87c9b1702e9..bb5cf18ecd2 100644
--- a/src/widgets/widgets/qmdisubwindow.cpp
+++ b/src/widgets/widgets/qmdisubwindow.cpp
@@ -479,7 +479,7 @@ void ControlLabel::updateWindowIcon()
     if (menuIcon.isNull())
         menuIcon = style()->standardIcon(QStyle::SP_TitleBarMenuButton, nullptr, parentWidget());
     const int iconSize = style()->pixelMetric(QStyle::PM_TitleBarButtonIconSize, nullptr, parentWidget());
-    label = menuIcon.pixmap(iconSize);
+    label = menuIcon.pixmap(QSize(iconSize, iconSize), devicePixelRatio());
     update();
 }