diff --git a/private/applethandle_p.h b/private/applethandle_p.h
index 67b947f40..63a450da3 100644
--- a/private/applethandle_p.h
+++ b/private/applethandle_p.h
@@ -39,6 +39,9 @@ class View;
 class AppletHandle : public QObject, public QGraphicsItem
 {
     Q_OBJECT
+#if QT_VERSION >= 0x040600
+    Q_INTERFACES(QGraphicsItem)
+#endif	    
     public:
         enum FadeType {
             FadeIn,
diff --git a/private/toolbox_p.h b/private/toolbox_p.h
index cd33add82..b5d4cd2ac 100644
--- a/private/toolbox_p.h
+++ b/private/toolbox_p.h
@@ -40,7 +40,9 @@ class ToolBoxPrivate;
 class ToolBox : public QObject, public QGraphicsItem
 {
     Q_OBJECT
-
+#if QT_VERSION >= 0x040600
+    Q_INTERFACES(QGraphicsItem)
+#endif
 public:
     /**
     * These flags represents what borders should be drawn