diff --git a/kcm/src/previewwidget.cpp b/kcm/src/previewwidget.cpp
index 3a7341e..8f1a9fd 100644
--- a/kcm/src/previewwidget.cpp
+++ b/kcm/src/previewwidget.cpp
@@ -1,87 +1,87 @@
 /*
  * Copyright (C) 2015 David Edmundson <davidedmundson@kde.org>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License or (at your option) version 3 or any later version
  * accepted by the membership of KDE e.V. (or its successor approved
  * by the membership of KDE e.V.), which shall act as a proxy
  * defined in Section 14 of version 3 of the license.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
 
 #include "previewwidget.h"
 
 #include <QDebug>
 #include <QPainter>
 
 #include "ui_stylepreview.h"
 
 
 PreviewWidget::PreviewWidget(QWidget *parent):
     QLabel(parent),
     m_scale(1.0),
     m_internalPreview(new QWidget) // deliberately no parent, we don't want it to have a screen
 {
     Ui::StylePreview ui;
     ui.setupUi(m_internalPreview);
 }
 
 PreviewWidget::~PreviewWidget()
 {
     delete m_internalPreview;
 }
 
 void PreviewWidget::setScale(qreal scale)
 {
     m_scale = scale;
 
     QFont font;
     //take the user's configured point size, and convert it to a pixel size for preview
 
     font.setPixelSize(pointSizeToPixelSize(font.pointSize()));
     m_internalPreview->setFont(font);
 
     //as we are a hidden widget, we need to force a repaint to update the size hint properly
     updatePixmapCache();
     m_internalPreview->resize(sizeHint());
     m_internalPreview->adjustSize();
 
     QPixmap preview = updatePixmapCache();
     setPixmap(preview);
 }
 
 qreal PreviewWidget::pointSizeToPixelSize(qreal pointSize) const
 {
     //point size is in how many 72ths of an inch it should be, default DPI is 96
     qreal pixelSize = pointSize * 96.0 / 72.0;
 
     //scale by our new factor
     pixelSize *= m_scale;
 
     return pixelSize / m_scale; //as we are now dealing with pixels it will be scaled up in the paint(), so it needs dividing here
 }
 
 QPixmap PreviewWidget::updatePixmapCache()
 {
    QPixmap pixmap(m_internalPreview ->sizeHint() * m_scale);
    pixmap.setDevicePixelRatio(m_scale);
    QPainter p(&pixmap);
    m_internalPreview ->render(&p);
 
    //render back at whatever the native DPR of the KCM is
-   pixmap.setDevicePixelRatio(devicePixelRatio());
+   pixmap.setDevicePixelRatio(devicePixelRatioF());
 
    return pixmap;
 }