diff --git a/src/core/kcolumnheadersmodel.h b/src/core/kcolumnheadersmodel.h
index 9279b07..fd5fff6 100644
--- a/src/core/kcolumnheadersmodel.h
+++ b/src/core/kcolumnheadersmodel.h
@@ -1,65 +1,65 @@
 /*
     Copyright (c) 2019 Arjen Hiemstra <ahiemstra@heimr.nl>
 
     This library 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) any later version.
 
     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 KCOLUMNHEADERSMODEL_H
 #define KCOLUMNHEADERSMODEL_H
 
 #include "kitemmodels_export.h"
 
 #include <memory>
 #include <QAbstractListModel>
 
 class KColumnHeadersModelPrivate;
 
 /**
  * A model that converts a model's headers into a list model.
  *
  * This model will expose the source model's headers as a simple list. This is
  * mostly useful as a helper for QML applications that want to display a model's
  * headers.
  *
  * Each columns's header will be presented as a row in this model. Roles are
  * forwarded directly to the source model's headerData() method.
  *
  * @since 5.66
  */
 class KITEMMODELS_EXPORT KColumnHeadersModel : public QAbstractListModel
 {
     Q_OBJECT
     Q_PROPERTY(QAbstractItemModel *sourceModel READ sourceModel WRITE setSourceModel NOTIFY sourceModelChanged)
 
 public:
     explicit KColumnHeadersModel(QObject *parent = nullptr);
     ~KColumnHeadersModel() override;
 
-    int rowCount(const QModelIndex &parent = QModelIndex{}) const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
     QVariant data(const QModelIndex &index, int role) const override;
     QHash<int, QByteArray> roleNames() const override;
 
     QAbstractItemModel *sourceModel() const;
     void setSourceModel(QAbstractItemModel *newSourceModel);
 
 Q_SIGNALS:
     void sourceModelChanged();
 
 private:
     const std::unique_ptr<KColumnHeadersModelPrivate> d;
 };
 
 #endif