diff --git a/kcmkwin/kwindecoration/declarative-plugin/plugin.cpp b/kcmkwin/kwindecoration/declarative-plugin/plugin.cpp
index 878f5a1c80..bdc197bf51 100644
--- a/kcmkwin/kwindecoration/declarative-plugin/plugin.cpp
+++ b/kcmkwin/kwindecoration/declarative-plugin/plugin.cpp
@@ -41,17 +41,10 @@ void Plugin::registerTypes(const char *uri)
     qmlRegisterType<KDecoration2::Preview::PreviewItem>(uri, 1, 0, "Decoration");
     qmlRegisterType<KDecoration2::Preview::PreviewButtonItem>(uri, 1, 0, "Button");
     qmlRegisterType<KDecoration2::Preview::ButtonsModel>(uri, 1, 0, "ButtonsModel");
-#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
-    qmlRegisterType<KDecoration2::Preview::PreviewClient>();
-    qmlRegisterType<KDecoration2::Decoration>();
-    qmlRegisterType<KDecoration2::DecorationShadow>();
-    qmlRegisterType<KDecoration2::Preview::PreviewBridge>();
-#else
     qmlRegisterAnonymousType<KDecoration2::Preview::PreviewClient>(uri, 1);
     qmlRegisterAnonymousType<KDecoration2::Decoration>(uri, 1);
     qmlRegisterAnonymousType<KDecoration2::DecorationShadow>(uri, 1);
     qmlRegisterAnonymousType<KDecoration2::Preview::PreviewBridge>(uri, 1);
-#endif
 }
 
 }
diff --git a/kcmkwin/kwindecoration/kcm.cpp b/kcmkwin/kwindecoration/kcm.cpp
index afd5236462..b4f8ddda13 100644
--- a/kcmkwin/kwindecoration/kcm.cpp
+++ b/kcmkwin/kwindecoration/kcm.cpp
@@ -68,15 +68,9 @@ KCMKWinDecoration::KCMKWinDecoration(QObject *parent, const QVariantList &argume
                      QStringLiteral("vpilo@coldshock.net"));
     setAboutData(about);
     setButtons(Apply | Default | Help);
-#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
-    qmlRegisterType<QAbstractListModel>();
-    qmlRegisterType<QSortFilterProxyModel>();
-    qmlRegisterType<KWinDecorationSettings>();
-#else
     qmlRegisterAnonymousType<QAbstractListModel>("org.kde.kwin.KWinDecoration", 1);
     qmlRegisterAnonymousType<QSortFilterProxyModel>("org.kde.kwin.KWinDecoration", 1);
     qmlRegisterAnonymousType<KWinDecorationSettings>("org.kde.kwin.KWinDecoration", 1);
-#endif
     m_proxyThemesModel->setSourceModel(m_themesModel);
     m_proxyThemesModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
     m_proxyThemesModel->setSortCaseSensitivity(Qt::CaseInsensitive);
diff --git a/plugins/qpa/integration.cpp b/plugins/qpa/integration.cpp
index 3b9d11c926..31ea702865 100644
--- a/plugins/qpa/integration.cpp
+++ b/plugins/qpa/integration.cpp
@@ -88,11 +88,7 @@ void Integration::initialize()
     );
     QPlatformIntegration::initialize();
     auto dummyScreen = new Screen(-1);
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
     QWindowSystemInterface::handleScreenAdded(dummyScreen);
-#else
-    screenAdded(dummyScreen);
-#endif
     m_screens << dummyScreen;
     m_inputContext.reset(QPlatformInputContextFactory::create(QStringLiteral("qtvirtualkeyboard")));
     qunsetenv("QT_IM_MODULE");
@@ -182,28 +178,16 @@ void Integration::initScreens()
     newScreens.reserve(qMax(screens()->count(), 1));
     for (int i = 0; i < screens()->count(); i++) {
         auto screen = new Screen(i);
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
         QWindowSystemInterface::handleScreenAdded(screen);
-#else
-        screenAdded(screen);
-#endif
         newScreens << screen;
     }
     if (newScreens.isEmpty()) {
         auto dummyScreen = new Screen(-1);
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
         QWindowSystemInterface::handleScreenAdded(dummyScreen);
-#else
-        screenAdded(dummyScreen);
-#endif
         newScreens << dummyScreen;
     }
     while (!m_screens.isEmpty()) {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
         QWindowSystemInterface::handleScreenRemoved(m_screens.takeLast());
-#else
-        destroyScreen(m_screens.takeLast());
-#endif
     }
     m_screens = newScreens;
 }