diff --git a/scripting/scripting.cpp b/scripting/scripting.cpp
index 89822b6639..84de5c8251 100644
--- a/scripting/scripting.cpp
+++ b/scripting/scripting.cpp
@@ -545,11 +545,14 @@ void KWin::DeclarativeScript::run()
         return;
     }
     // add read config
+#warning DeclarativeScripts needs porting of KDeclarative
+#if KWIN_QT5_PORTING
     KDeclarative kdeclarative;
     kdeclarative.setDeclarativeEngine(m_engine);
     kdeclarative.initialize();
     kdeclarative.setupBindings();
     installScriptFunctions(kdeclarative.scriptEngine());
+#endif
     qmlRegisterType<DesktopThumbnailItem>("org.kde.kwin", 0, 1, "DesktopThumbnailItem");
     qmlRegisterType<WindowThumbnailItem>("org.kde.kwin", 0, 1, "ThumbnailItem");
     qmlRegisterType<KWin::ScriptingClientModel::ClientModel>();
diff --git a/tabbox/declarative.cpp b/tabbox/declarative.cpp
index 7c13c63def..f10e8d09bb 100644
--- a/tabbox/declarative.cpp
+++ b/tabbox/declarative.cpp
@@ -134,10 +134,13 @@ DeclarativeView::DeclarativeView(QAbstractItemModel *model, TabBoxConfig::TabBox
     pal.setColor(backgroundRole(), Qt::transparent);
     setPalette(pal);
     engine()->addImageProvider(QLatin1String("client"), new ImageProvider(model));
+#warning TabBox needs porting of KDeclarative
+#if KWIN_QT5_PORTING
     KDeclarative kdeclarative;
     kdeclarative.setDeclarativeEngine(engine());
     kdeclarative.initialize();
     kdeclarative.setupBindings();
+#endif
 #ifndef TABBOX_KCM
     qmlRegisterType<DesktopThumbnailItem>("org.kde.kwin", 0, 1, "DesktopThumbnailItem");
 #endif