diff --git a/kcmkwin/kwintabbox/layoutpreview.cpp b/kcmkwin/kwintabbox/layoutpreview.cpp
index a5922a0a3c..6af3cc6251 100644
--- a/kcmkwin/kwintabbox/layoutpreview.cpp
+++ b/kcmkwin/kwintabbox/layoutpreview.cpp
@@ -43,6 +43,7 @@ LayoutPreview::LayoutPreview(const QString &path, QObject *parent)
     QQmlComponent *component = new QQmlComponent(engine, this);
     qmlRegisterType<WindowThumbnailItem>("org.kde.kwin", 2, 0, "ThumbnailItem");
     qmlRegisterType<SwitcherItem>("org.kde.kwin", 2, 0, "Switcher");
+    qmlRegisterType<QAbstractItemModel>();
     component->loadUrl(QUrl::fromLocalFile(path));
     QObject *item = component->create();
     auto findSwitcher = [item]() -> SwitcherItem* {
diff --git a/tabbox/tabboxhandler.cpp b/tabbox/tabboxhandler.cpp
index 99a47d3610..8514e06c90 100644
--- a/tabbox/tabboxhandler.cpp
+++ b/tabbox/tabboxhandler.cpp
@@ -293,6 +293,7 @@ void TabBoxHandlerPrivate::show()
         qmlRegisterType<SwitcherItem>("org.kde.kwin", 2, 0, "Switcher");
         qmlRegisterType<DesktopThumbnailItem>("org.kde.kwin", 2, 0, "DesktopThumbnailItem");
         qmlRegisterType<WindowThumbnailItem>("org.kde.kwin", 2, 0, "ThumbnailItem");
+        qmlRegisterType<QAbstractItemModel>();
     }
     if (m_qmlComponent.isNull()) {
         m_qmlComponent.reset(new QQmlComponent(m_qmlEngine.data()));