diff --git a/src/widgets/dialogs/qwizard_win.cpp b/src/widgets/dialogs/qwizard_win.cpp
index 34708c3e8de..2c4f049e888 100644
--- a/src/widgets/dialogs/qwizard_win.cpp
+++ b/src/widgets/dialogs/qwizard_win.cpp
@@ -33,7 +33,7 @@ Q_DECLARE_METATYPE(QMargins)
 
 QT_BEGIN_NAMESPACE
 
-int QVistaHelper::m_devicePixelRatio = 1;
+qreal QVistaHelper::m_devicePixelRatio = 1.0;
 
 /******************************************************************************
 ** QVistaBackButton
@@ -82,7 +82,7 @@ void QVistaBackButton::paintEvent(QPaintEvent *)
     RECT clipRect;
     int xoffset = origin.x() + QWidget::mapToParent(r.topLeft()).x() - 1;
     int yoffset = origin.y() + QWidget::mapToParent(r.topLeft()).y() - 1;
-    const int dpr = devicePixelRatio();
+    const qreal dpr = devicePixelRatio();
     const QRect rDp = QRect(r.topLeft() * dpr, r.size() * dpr);
     const int xoffsetDp = xoffset * dpr;
     const int yoffsetDp = yoffset * dpr;
diff --git a/src/widgets/dialogs/qwizard_win_p.h b/src/widgets/dialogs/qwizard_win_p.h
index 45f26a1ebfb..ce0f7b85b33 100644
--- a/src/widgets/dialogs/qwizard_win_p.h
+++ b/src/widgets/dialogs/qwizard_win_p.h
@@ -110,7 +110,7 @@ private:
 
     int titleBarOffset;  // Extra spacing above the text
     int iconSpacing;    // Space between button and icon
-    static int m_devicePixelRatio;
+    static qreal m_devicePixelRatio;
 };