diff --git a/src/declarativeimports/core/dialog.cpp b/src/declarativeimports/core/dialog.cpp
index b353caf02..db3c67e8c 100644
--- a/src/declarativeimports/core/dialog.cpp
+++ b/src/declarativeimports/core/dialog.cpp
@@ -54,7 +54,8 @@ DialogProxy::DialogProxy(QQuickItem *parent)
       m_location(Plasma::Types::BottomEdge),
       m_type(Normal),
       m_hideOnWindowDeactivate(false),
-      m_outputOnly(false)
+      m_outputOnly(false),
+      m_componentComplete(false)
 {
     QSurfaceFormat format;
     format.setAlphaBufferSize(8);
@@ -453,6 +454,10 @@ void DialogProxy::syncToMainItemSize()
 
 void DialogProxy::requestSyncToMainItemSize(bool delayed)
 {
+    if (!m_componentComplete) {
+        return;
+    }
+
     if (delayed && !m_syncTimer->isActive()) {
         m_syncTimer->start(150);
     } else {
@@ -524,6 +529,17 @@ void DialogProxy::hideEvent(QHideEvent *event)
     QQuickWindow::hideEvent(event);
 }
 
+void DialogProxy::classBegin()
+{
+
+}
+
+void DialogProxy::componentComplete()
+{
+    m_componentComplete = true;
+    syncToMainItemSize();
+}
+
 void DialogProxy::syncBorders()
 {
     // FIXME: QWindow::screen() never ever changes if the window is moved across
diff --git a/src/declarativeimports/core/dialog.h b/src/declarativeimports/core/dialog.h
index 3c0df8b71..a4cd427f9 100644
--- a/src/declarativeimports/core/dialog.h
+++ b/src/declarativeimports/core/dialog.h
@@ -24,6 +24,7 @@
 #include <QQuickWindow>
 #include <QWeakPointer>
 #include <QPoint>
+#include <QQmlParserStatus>
 
 #include <Plasma/Plasma>
 #include <Plasma/Theme>
@@ -44,9 +45,10 @@ namespace Plasma
  *
  * Exposed as `PlasmaCore.Dialog` in QML.
  */
-class DialogProxy : public QQuickWindow
+class DialogProxy : public QQuickWindow, public QQmlParserStatus
 {
     Q_OBJECT
+    Q_INTERFACES(QQmlParserStatus)
 
     /**
      * The main QML item that will be displayed in the Dialog
@@ -161,6 +163,9 @@ protected:
     void hideEvent(QHideEvent *event);
     bool event(QEvent *event);
 
+    virtual void classBegin();
+    virtual void componentComplete();
+
     QTimer *m_syncTimer;
     Plasma::Types::Location m_location;
     Plasma::FrameSvgItem *m_frameSvgItem;
@@ -185,6 +190,7 @@ private:
     bool m_hideOnWindowDeactivate;
     bool m_outputOnly;
     Plasma::Theme m_theme;
+    bool m_componentComplete;
 
     //Attached Layout property of mainItem, if any
     QWeakPointer <QObject> m_mainItemLayout;