diff --git a/src/declarativeimports/core/corebindingsplugin.cpp b/src/declarativeimports/core/corebindingsplugin.cpp
index 9a7886db7..4cd4f6b30 100644
--- a/src/declarativeimports/core/corebindingsplugin.cpp
+++ b/src/declarativeimports/core/corebindingsplugin.cpp
@@ -96,17 +96,9 @@ void CoreBindingsPlugin::registerTypes(const char *uri)
     qmlRegisterRevision<QQuickItem, 1>(uri, 2, 0);
     qmlRegisterType<ToolTip>(uri, 2, 0, "ToolTipArea");
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
-    qmlRegisterInterface<Plasma::Service>(uri, 1);
-#else
     qmlRegisterInterface<Plasma::Service>("Service");
-#endif
     qRegisterMetaType<Plasma::Service *>("Service");
-#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
-    qmlRegisterInterface<Plasma::ServiceJob>(uri, 1);
-#else
     qmlRegisterInterface<Plasma::ServiceJob>("ServiceJob");
-#endif
     qRegisterMetaType<Plasma::ServiceJob *>("ServiceJob");
     qmlRegisterType<ServiceOperationStatus>(uri, 2, 0, "ServiceOperationStatus");
 #if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
@@ -122,11 +114,7 @@ void CoreBindingsPlugin::registerTypes(const char *uri)
 #endif
     qmlRegisterType<IconItem>(uri, 2, 0, "IconItem");
 
-#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
-    qmlRegisterInterface<Plasma::DataSource>(uri, 1);
-#else
     qmlRegisterInterface<Plasma::DataSource>("DataSource");
-#endif
     qRegisterMetaType<Plasma::DataSource *>("DataSource");
 
     qmlRegisterType<Plasma::WindowThumbnail>(uri, 2, 0, "WindowThumbnail");