diff --git a/src/resources/datamodel.cpp b/src/resources/datamodel.cpp
index 0614f6b3..5a96227d 100644
--- a/src/resources/datamodel.cpp
+++ b/src/resources/datamodel.cpp
@@ -1,100 +1,100 @@
 /*
  *  datamodel.cpp  -  calendar data model dependent functions
  *  Program:  kalarm
  *  Copyright © 2019-2020 David Jarvie <djarvie@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.
  */
 
 #include "datamodel.h"
 
 #include "akonadidatamodel.h"
 #include "akonadiresource.h"
 #include "akonadiresourcecreator.h"
 #include "akonadicalendarupdater.h"
 #include "eventmodel.h"
 #include "resourcemodel.h"
 
 namespace DataModel
 {
 
 void initialise()
 {
     AkonadiDataModel::instance();
 }
 
 void reload()
 {
     AkonadiDataModel::instance()->reload();
 }
 
 bool reload(Resource& resource)
 {
     return AkonadiDataModel::instance()->reload(resource);
 }
 
 bool isMigrationComplete()
 {
     return AkonadiDataModel::instance()->isMigrationComplete();
 }
 
 void removeDuplicateResources()
 {
     AkonadiResource::removeDuplicateResources();
 }
 
 ResourceListModel* createResourceListModel(QObject* parent)
 {
     return ResourceListModel::create<AkonadiDataModel>(parent);
 }
 
 ResourceFilterCheckListModel* createResourceFilterCheckListModel(QObject* parent)
 {
     return ResourceFilterCheckListModel::create<AkonadiDataModel>(parent);
 }
 
 AlarmListModel* createAlarmListModel(QObject* parent)
 {
     return AlarmListModel::create<AkonadiDataModel>(parent);
 }
 
 AlarmListModel* allAlarmListModel()
 {
     return AlarmListModel::all<AkonadiDataModel>();
 }
 
 TemplateListModel* createTemplateListModel(QObject* parent)
 {
     return TemplateListModel::create<AkonadiDataModel>(parent);
 }
 
 TemplateListModel* allTemplateListModel()
 {
     return TemplateListModel::all<AkonadiDataModel>();
 }
 
 ResourceCreator* createResourceCreator(KAlarmCal::CalEvent::Type defaultType, QWidget* parent)
 {
     return new AkonadiResourceCreator(defaultType, parent);
 }
 
-void updateCalendarToCurrentFormat(const Resource& resource, bool ignoreKeepFormat, QObject* parent)
+void updateCalendarToCurrentFormat(Resource& resource, bool ignoreKeepFormat, QObject* parent)
 {
     AkonadiCalendarUpdater::updateToCurrentFormat(resource, ignoreKeepFormat, parent);
 }
 
 } // namespace DataModel
 
 // vim: et sw=4: