diff --git a/src/instanceselector.h b/src/instanceselector.h
index 1262890..93fa4af 100644
--- a/src/instanceselector.h
+++ b/src/instanceselector.h
@@ -1,59 +1,59 @@
 /*
     This file is part of Akonadi.
 
     Copyright (c) 2012 Volker Krause <vkrause@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) any later version.
 
     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, write to the Free Software
     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
     USA.
 */
 
 #ifndef INSTANCESELECTOR_H
 #define INSTANCESELECTOR_H
 
 #include "mainwindow.h"
 #include "libakonadiconsole_export.h"
 
 #include <QDialog>
 
 namespace Ui
 {
 class InstanceSelector;
 }
 
 /** Check if there are multiple instances of Akonadi running, and if so present
  *  a list to select the one to connect to.
  */
 class LIBAKONADICONSOLE_EXPORT InstanceSelector : public QDialog
 {
     Q_OBJECT
 public:
-    explicit InstanceSelector(const QString &remoteHost, QWidget *parent = nullptr, Qt::WindowFlags flags = nullptr);
+    explicit InstanceSelector(const QString &remoteHost, QWidget *parent = nullptr, Qt::WindowFlags flags = {});
     virtual ~InstanceSelector();
 
 private Q_SLOTS:
     void slotAccept();
     void slotReject();
 
 private:
     static QStringList instances();
 
 private:
     QScopedPointer<Ui::InstanceSelector> ui;
     QString m_remoteHost;
     QString m_instance;
     MainWindow *mWindow = nullptr;
 };
 
 #endif // INSTANCESELECTOR_H