diff --git a/declarativeimports/core/dialog.cpp b/declarativeimports/core/dialog.cpp
index 71ea7923e..3e1ee6f8e 100644
--- a/declarativeimports/core/dialog.cpp
+++ b/declarativeimports/core/dialog.cpp
@@ -83,7 +83,12 @@ QGraphicsObject *DialogProxy::mainItem() const
 void DialogProxy::setMainItem(QGraphicsObject *mainItem)
 {
     if (m_mainItem.data() != mainItem) {
+        if (m_mainItem) {
+            m_mainItem.data()->setParent(mainItem->parent());
+        }
         m_mainItem = mainItem;
+        mainItem->setParentItem(0);
+        mainItem->setParent(this);
 
         //if this is called in Compenent.onCompleted we have to wait a loop the item is added to a scene
         QTimer::singleShot(0, this, SLOT(syncMainItem()));