diff --git a/kcm/kcmakonadicontactactions.cpp b/kcm/kcmakonadicontactactions.cpp
index a547617e..8d335650 100644
--- a/kcm/kcmakonadicontactactions.cpp
+++ b/kcm/kcmakonadicontactactions.cpp
@@ -1,163 +1,151 @@
 /*
     This file is part of Akonadi Contact.
 
     Copyright (C) 2013-2020 Laurent Montel <montel@kde.org>
     Copyright (c) 2009 Tobias Koenig <tokoe@kde.org>
 
     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.
 */
 
 #include "kcmakonadicontactactions.h"
 
 #include "contactactionssettings.h"
 
 #include <KAboutData>
 #include <KConfigDialogManager>
 #include <KPluginFactory>
 #include <KLocalizedString>
 
 Q_DECLARE_METATYPE(ContactActionsSettings::EnumDialPhoneNumberAction)
 
 K_PLUGIN_FACTORY(KCMAkonadiContactActionsFactory, registerPlugin<KCMAkonadiContactActions>();
                  )
 
 KCMAkonadiContactActions::KCMAkonadiContactActions(QWidget *parent, const QVariantList &args)
     : KCModule(parent, args)
 {
     KAboutData *about = new KAboutData(QStringLiteral("kcmakonadicontactactions"),
                                        i18n("Contact Actions Settings"),
                                        QString(), QString(), KAboutLicense::LGPL,
                                        i18n("(c) 2009 Tobias Koenig"));
 
     about->addAuthor(i18n("Tobias Koenig"), QString(), QStringLiteral("tokoe@kde.org"));
 
     setAboutData(about);
     ui.setupUi(this);
 
     mConfigManager = addConfig(ContactActionsSettings::self(), this);
 
     ui.DialPhoneNumberAction->addItem(i18n("System Default"), ContactActionsSettings::UseSystemDefault);
     ui.DialPhoneNumberAction->addItem(i18n("Skype"), ContactActionsSettings::UseSkype);
     ui.DialPhoneNumberAction->addItem(i18n("Ekiga"), ContactActionsSettings::UseEkiga);
     ui.DialPhoneNumberAction->addItem(i18n("SflPhone"), ContactActionsSettings::UseSflPhone);
     ui.DialPhoneNumberAction->addItem(i18n("External Application"), ContactActionsSettings::UseExternalPhoneApplication);
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
     connect(ui.DialPhoneNumberAction, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &KCMAkonadiContactActions::slotDialPhoneNumberActionChanged);
-#else
-    connect(ui.DialPhoneNumberAction, QOverload<int, const QString &>::of(&QComboBox::currentIndexChanged), this, &KCMAkonadiContactActions::slotDialPhoneNumberActionChanged);
-#endif
     ui.SendSmsAction->addItem(i18n("System Default"), ContactActionsSettings::UseSystemDefaultSms);
     ui.SendSmsAction->addItem(i18n("Skype"), ContactActionsSettings::UseSkypeSms);
     ui.SendSmsAction->addItem(i18n("SflPhone"), ContactActionsSettings::UseSflPhoneSms);
     ui.SendSmsAction->addItem(i18n("External Application"), ContactActionsSettings::UseExternalSmsApplication);
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
     connect(ui.SendSmsAction, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &KCMAkonadiContactActions::slotSmsPhoneNumberActionChanged);
-#else
-    connect(ui.SendSmsAction, QOverload<int, const QString &>::of(&QComboBox::currentIndexChanged), this, &KCMAkonadiContactActions::slotSmsPhoneNumberActionChanged);
-#endif
     ui.ShowAddressAction->addItem(i18n("Web Browser"), ContactActionsSettings::UseBrowser);
     ui.ShowAddressAction->addItem(i18n("External Application"), ContactActionsSettings::UseExternalAddressApplication);
     ui.ShowAddressAction->addItem(i18n("Google map"), ContactActionsSettings::UseGooglemap);
     ui.ShowAddressAction->addItem(i18n("Map quest"), ContactActionsSettings::UseMapquest);
     ui.ShowAddressAction->addItem(i18n("OpenStreetMap"), ContactActionsSettings::UseOpenStreetMap);
-#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
     connect(ui.ShowAddressAction, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &KCMAkonadiContactActions::slotShowAddressActionChanged);
-#else
-    connect(ui.ShowAddressAction, QOverload<int, const QString &>::of(&QComboBox::currentIndexChanged), this, &KCMAkonadiContactActions::slotShowAddressActionChanged);
-#endif
 
     load();
 }
 
 void KCMAkonadiContactActions::slotShowAddressActionChanged(int value)
 {
     ContactActionsSettings::EnumShowAddressAction enumValue = static_cast<ContactActionsSettings::EnumShowAddressAction>(ui.ShowAddressAction->itemData(value).toInt());
     if (enumValue == ContactActionsSettings::UseBrowser) {
         ui.stackedWidget->setCurrentIndex(0);
     } else if (enumValue == ContactActionsSettings::UseExternalAddressApplication) {
         ui.stackedWidget->setCurrentIndex(1);
     } else {
         ui.stackedWidget->setCurrentIndex(2);
     }
     Q_EMIT changed(true);
 }
 
 void KCMAkonadiContactActions::slotSmsPhoneNumberActionChanged(int value)
 {
     ContactActionsSettings::EnumSendSmsAction enumValue = static_cast<ContactActionsSettings::EnumSendSmsAction>(ui.SendSmsAction->itemData(value).toInt());
     if (enumValue == ContactActionsSettings::UseExternalSmsApplication) {
         ui.smsDetailsStack->setCurrentIndex(1);
     } else {
         ui.smsDetailsStack->setCurrentIndex(0);
     }
     Q_EMIT changed(true);
 }
 
 void KCMAkonadiContactActions::slotDialPhoneNumberActionChanged(int value)
 {
     ContactActionsSettings::EnumDialPhoneNumberAction enumValue = static_cast<ContactActionsSettings::EnumDialPhoneNumberAction>(ui.DialPhoneNumberAction->itemData(value).toInt());
     if (enumValue == ContactActionsSettings::UseExternalPhoneApplication) {
         ui.phoneDetailsStack->setCurrentIndex(1);
     } else {
         ui.phoneDetailsStack->setCurrentIndex(0);
     }
     Q_EMIT changed(true);
 }
 
 void KCMAkonadiContactActions::load()
 {
     mConfigManager->updateWidgets();
 
     ContactActionsSettings::EnumShowAddressAction enumValueAddress = static_cast<ContactActionsSettings::EnumShowAddressAction>(ContactActionsSettings::self()->showAddressAction());
     const int indexAddress = ui.ShowAddressAction->findData(enumValueAddress);
     ui.ShowAddressAction->setCurrentIndex(indexAddress);
 
     ContactActionsSettings::EnumDialPhoneNumberAction enumValue = static_cast<ContactActionsSettings::EnumDialPhoneNumberAction>(ContactActionsSettings::self()->dialPhoneNumberAction());
     const int index = ui.DialPhoneNumberAction->findData(enumValue);
     ui.DialPhoneNumberAction->setCurrentIndex(index);
 
     ContactActionsSettings::EnumSendSmsAction enumValueSms = static_cast<ContactActionsSettings::EnumSendSmsAction>(ContactActionsSettings::self()->sendSmsAction());
     const int indexSms = ui.SendSmsAction->findData(enumValueSms);
     ui.SendSmsAction->setCurrentIndex(indexSms);
 }
 
 void KCMAkonadiContactActions::save()
 {
     mConfigManager->updateSettings();
     ContactActionsSettings::EnumShowAddressAction enumValueAddress
         = static_cast<ContactActionsSettings::EnumShowAddressAction>(ui.ShowAddressAction->itemData(ui.ShowAddressAction->currentIndex()).toInt());
     ContactActionsSettings::self()->setShowAddressAction(enumValueAddress);
 
     ContactActionsSettings::EnumDialPhoneNumberAction enumValue
         = static_cast<ContactActionsSettings::EnumDialPhoneNumberAction>(ui.DialPhoneNumberAction->itemData(ui.DialPhoneNumberAction->currentIndex()).toInt());
     ContactActionsSettings::self()->setDialPhoneNumberAction(enumValue);
 
     ContactActionsSettings::EnumSendSmsAction enumValueSms = static_cast<ContactActionsSettings::EnumSendSmsAction>(ui.SendSmsAction->itemData(ui.SendSmsAction->currentIndex()).toInt());
     ContactActionsSettings::self()->setSendSmsAction(enumValueSms);
     ContactActionsSettings::self()->save();
 }
 
 void KCMAkonadiContactActions::defaults()
 {
     mConfigManager->updateWidgetsDefault();
     const bool bUseDefaults = ContactActionsSettings::self()->useDefaults(true);
     ui.DialPhoneNumberAction->setCurrentIndex(ContactActionsSettings::self()->dialPhoneNumberAction());
     ui.SendSmsAction->setCurrentIndex(ContactActionsSettings::self()->sendSmsAction());
     ui.ShowAddressAction->setCurrentIndex(ContactActionsSettings::self()->showAddressAction());
     ContactActionsSettings::self()->useDefaults(bUseDefaults);
 }
 
 #include "kcmakonadicontactactions.moc"