diff --git a/kcms/phonon/backendselection.h b/kcms/phonon/backendselection.h
index 15eea61c..f000e34c 100644
--- a/kcms/phonon/backendselection.h
+++ b/kcms/phonon/backendselection.h
@@ -1,74 +1,74 @@
 /*  This file is part of the KDE project
     Copyright (C) 2004-2007 Matthias Kretz <kretz@kde.org>
     Copyright (C) 2011-2014 Harald Sitter <sitter@kde.org>
 
     This program is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) version 3.
 
     This library 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
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #ifndef BACKENDSELECTION_H
 #define BACKENDSELECTION_H
 
 #include "ui_backendselection.h"
 
 #include <QHash>
 #include <QWidget>
 
 class KCModuleProxy;
 
 struct BackendDescriptor {
     explicit BackendDescriptor(const QString &path = QString());
 
     bool isValid;
 
     QString iid;
 
     QString name;
     QString icon;
     QString version;
     QString website;
     int preference;
 
     QString pluginPath;
 
     /** Implemented for qSort(QList) */
     bool operator <(const BackendDescriptor &rhs) const;
 };
 
 class BackendSelection : public QWidget, private Ui::BackendSelection
 {
     Q_OBJECT
 public:
-    explicit BackendSelection(QWidget *parent = 0);
+    explicit BackendSelection(QWidget *parent = nullptr);
 
     void load();
     void save();
     void defaults();
 
 private Q_SLOTS:
     void selectionChanged();
     void up();
     void down();
     void openWebsite(const QString &url);
 
 Q_SIGNALS:
     void changed();
 
 private:
     QHash<QString, struct BackendDescriptor> m_backends;
     int m_emptyPage;
 };
 
 #endif // BACKENDSELECTION_H
diff --git a/kcms/phonon/devicepreference.h b/kcms/phonon/devicepreference.h
index fcae4b2d..2ed8f368 100644
--- a/kcms/phonon/devicepreference.h
+++ b/kcms/phonon/devicepreference.h
@@ -1,95 +1,95 @@
 /*  This file is part of the KDE project
     Copyright (C) 2006-2008 Matthias Kretz <kretz@kde.org>
     Copyright (C) 2011 Casian Andrei <skeletk13@gmail.com>
 
     This program is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) version 3.
 
     This library 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
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #ifndef DEVICEPREFERENCE_H_STUPID_UIC
 #define DEVICEPREFERENCE_H_STUPID_UIC
 
 #include "ui_devicepreference.h"
 
 #include <QMap>
 #include <QStandardItem>
 
 #include <phonon/objectdescription.h>
 #include <phonon/objectdescriptionmodel.h>
 
 namespace Phonon {
 
 class MediaObject;
 class AudioOutput;
 class VideoWidget;
 
 class DevicePreference : public QWidget, private Ui::DevicePreference
 {
     Q_OBJECT
 public:
-    explicit DevicePreference(QWidget *parent = 0);
+    explicit DevicePreference(QWidget *parent = nullptr);
     ~DevicePreference() override;
 
     void load();
     void save();
     void defaults();
     void pulseAudioEnabled();
 
 Q_SIGNALS:
     void changed();
 
 protected:
     void changeEvent(QEvent *) override;
 
 private Q_SLOTS:
     void on_preferButton_clicked();
     void on_deferButton_clicked();
     void on_showAdvancedDevicesCheckBox_toggled();
     void on_applyPreferencesButton_clicked();
     void on_testPlaybackButton_toggled(bool down);
     void updateButtonsEnabled();
     void updateDeviceList();
     void updateAudioOutputDevices();
     void updateAudioCaptureDevices();
     void updateVideoCaptureDevices();
 
 private:
     enum DeviceType {dtInvalidDevice, dtAudioOutput, dtAudioCapture, dtVideoCapture};
 
 private:
     template<ObjectDescriptionType T> void removeDevice(const ObjectDescription<T> &deviceToRemove,
                                                         QMap<int, ObjectDescriptionModel<T> *> *modelMap);
     void loadCategoryDevices();
     QList<AudioOutputDevice> availableAudioOutputDevices() const;
     QList<AudioCaptureDevice> availableAudioCaptureDevices() const;
     QList<VideoCaptureDevice> availableVideoCaptureDevices() const;
     DeviceType shownModelType() const;
 
 private:
     QMap<int, AudioOutputDeviceModel *> m_audioOutputModel;
     QMap<int, AudioCaptureDeviceModel *> m_audioCaptureModel;
     QMap<int, VideoCaptureDeviceModel *> m_videoCaptureModel;
     QStandardItemModel m_categoryModel;
     QStandardItemModel m_headerModel;
     DeviceType m_testingType;
 
     MediaObject *m_media;
     AudioOutput *m_audioOutput;
     VideoWidget *m_videoWidget;
 };
 
 } // namespace Phonon
 
 #endif // DEVICEPREFERENCE_H_STUPID_UIC