diff --git a/src/common/QskObjectCounter.cpp b/src/common/QskObjectCounter.cpp
index b6f8b585d..9527026f6 100644
--- a/src/common/QskObjectCounter.cpp
+++ b/src/common/QskObjectCounter.cpp
@@ -7,11 +7,11 @@
 
 #include <qdebug.h>
 #include <qset.h>
+#include <qobject.h>
+#include <qcoreapplication.h>
 
 QSK_QT_PRIVATE_BEGIN
 #include <private/qhooks_p.h>
-#include <private/qobject_p.h>
-#include <private/qquickitem_p.h>
 QSK_QT_PRIVATE_END
 
 #define QSK_OBJECT_INFO 0
@@ -20,10 +20,19 @@ QSK_QT_PRIVATE_END
 #include <qset.h>
 #endif
 
+#if QT_VERSION < QT_VERSION_CHECK( 6, 4, 0 )
+
+QSK_QT_PRIVATE_BEGIN
+#include <private/qquickitem_p.h>
+QSK_QT_PRIVATE_END
+
+#endif
+
 static inline bool qskIsItem( const QObject* object )
 {
-    QObjectPrivate* o_p = QObjectPrivate::get( const_cast< QObject* >( object ) );
-
+#if QT_VERSION >= QT_VERSION_CHECK( 6, 4, 0 )
+    return object->isQuickItemType();
+#else
     /*
         The addObject hook is called from the constructor of QObject,
         where we don't have the derived class constructed yet.
@@ -31,7 +40,9 @@ static inline bool qskIsItem( const QObject* object )
         RTTI being enabled. TODO ...
      */
 
+    auto o_p = QObjectPrivate::get( const_cast< QObject* >( object ) );
     return dynamic_cast< QQuickItemPrivate* >( o_p ) != nullptr;
+#endif
 }
 
 namespace
diff --git a/src/common/QskPlatform.cpp b/src/common/QskPlatform.cpp
index c42bbaf33..018ef40a0 100644
--- a/src/common/QskPlatform.cpp
+++ b/src/common/QskPlatform.cpp
@@ -23,6 +23,11 @@ const QPlatformIntegration* qskPlatformIntegration()
     return QGuiApplicationPrivate::platformIntegration();
 }
 
+const QPlatformTheme* qskPlatformTheme()
+{
+    return QGuiApplicationPrivate::platformTheme();
+}
+
 bool qskMaybeDesktopPlatform()
 {
 #if QT_CONFIG(cursor)
diff --git a/src/common/QskPlatform.h b/src/common/QskPlatform.h
index d2301e3b8..26be24a04 100644
--- a/src/common/QskPlatform.h
+++ b/src/common/QskPlatform.h
@@ -10,14 +10,17 @@
 
 class QScreen;
 class QPlatformIntegration;
+class QPlatformTheme;
 class QRect;
 
 QSK_EXPORT qreal qskGlobalScaleFactor();
 
 QSK_EXPORT bool qskMaybeDesktopPlatform();
-QSK_EXPORT const QPlatformIntegration* qskPlatformIntegration();
 QSK_EXPORT QRect qskPlatformScreenGeometry( const QScreen* );
 
+QSK_EXPORT const QPlatformIntegration* qskPlatformIntegration();
+QSK_EXPORT const QPlatformTheme* qskPlatformTheme();
+
 /*
     One dp is a virtual pixel unit that's roughly equal to one pixel
     on a medium-density screen ( 160 dpi ). 
diff --git a/src/controls/QskEvent.cpp b/src/controls/QskEvent.cpp
index a3152e92b..b0063dbad 100644
--- a/src/controls/QskEvent.cpp
+++ b/src/controls/QskEvent.cpp
@@ -9,11 +9,7 @@
 #include <qevent.h>
 
 #if QT_VERSION >= QT_VERSION_CHECK( 6, 4, 0 )
-
-    QSK_QT_PRIVATE_BEGIN
-    #include <private/qguiapplication_p.h>
-    QSK_QT_PRIVATE_END
-
+    #include "QskPlatform.h"
     #include <qpa/qplatformtheme.h>
 #endif
 
@@ -127,7 +123,7 @@ bool qskIsStandardKeyInput( const QKeyEvent* event, QKeySequence::StandardKey ke
     constexpr auto mask = ~( Qt::KeypadModifier | Qt::GroupSwitchModifier );
 
     // We should route this call through the skin. TODO
-    const auto theme = QGuiApplicationPrivate::platformTheme();
+    const auto theme = qskPlatformTheme();
     const auto bindings = theme->keyBindings( ( event->modifiers() | event->key() ) & mask );
 
     return bindings.contains( QKeySequence(searchkey) );
@@ -138,8 +134,7 @@ bool qskIsButtonPressKey( const QKeyEvent* event )
 {
 #if QT_VERSION >= QT_VERSION_CHECK( 6, 4, 0 )
 
-    const auto hint = QGuiApplicationPrivate::platformTheme()->themeHint(
-        QPlatformTheme::ButtonPressKeys );
+    const auto hint = qskPlatformTheme()->themeHint( QPlatformTheme::ButtonPressKeys );
 
     const auto keys = hint.value< QList< Qt::Key > >();
     return keys.contains( static_cast< Qt::Key >( event->key() ) );
diff --git a/src/controls/QskQuick.cpp b/src/controls/QskQuick.cpp
index d08f5fbc9..fceff5e9d 100644
--- a/src/controls/QskQuick.cpp
+++ b/src/controls/QskQuick.cpp
@@ -7,10 +7,10 @@
 #include "QskControl.h"
 #include "QskFunctions.h"
 #include "QskLayoutElement.h"
+#include "QskPlatform.h"
 #include <qquickitem.h>
 
 QSK_QT_PRIVATE_BEGIN
-#include <private/qguiapplication_p.h>
 #include <private/qquickitem_p.h>
 QSK_QT_PRIVATE_END
 
@@ -277,7 +277,7 @@ void qskUpdateInputMethod( const QQuickItem* item, Qt::InputMethodQueries querie
         when using it. So let's go with QGuiApplicationPrivate.
      */
 
-    auto inputContext = QGuiApplicationPrivate::platformIntegration()->inputContext();
+    auto inputContext = qskPlatformIntegration()->inputContext();
     if ( inputContext == nullptr )
     {
         context = nullptr;
@@ -317,7 +317,7 @@ void qskInputMethodSetVisible( const QQuickItem* item, bool on )
     static QPlatformInputContext* context = nullptr;
     static int methodId = -1;
 
-    auto inputContext = QGuiApplicationPrivate::platformIntegration()->inputContext();
+    auto inputContext = qskPlatformIntegration()->inputContext();
     if ( inputContext == nullptr )
     {
         context = nullptr;
diff --git a/src/controls/QskQuickItem.cpp b/src/controls/QskQuickItem.cpp
index 195d0f2ef..21a117645 100644
--- a/src/controls/QskQuickItem.cpp
+++ b/src/controls/QskQuickItem.cpp
@@ -26,7 +26,9 @@ QSK_QT_PRIVATE_BEGIN
     #endif
 #endif
 
+#if defined( QT_DEBUG )
 #include <private/qquickpositioners_p.h>
+#endif
 
 QSK_QT_PRIVATE_END
 
diff --git a/src/controls/QskScrollArea.cpp b/src/controls/QskScrollArea.cpp
index b5438f161..520ff0112 100644
--- a/src/controls/QskScrollArea.cpp
+++ b/src/controls/QskScrollArea.cpp
@@ -11,10 +11,8 @@
 #include "QskSGNode.h"
 
 QSK_QT_PRIVATE_BEGIN
-#include <private/qquickclipnode_p.h>
 #include <private/qquickitem_p.h>
 #include <private/qquickitemchangelistener_p.h>
-#include <private/qquickwindow_p.h>
 QSK_QT_PRIVATE_END
 
 static inline bool qskNeedsScrollBars(
diff --git a/src/controls/QskSkin.cpp b/src/controls/QskSkin.cpp
index a350f83cf..4203604d4 100644
--- a/src/controls/QskSkin.cpp
+++ b/src/controls/QskSkin.cpp
@@ -16,10 +16,7 @@
 
 #include "QskMargins.h"
 
-QSK_QT_PRIVATE_BEGIN
-#include <private/qguiapplication_p.h>
-QSK_QT_PRIVATE_END
-
+#include <qguiapplication.h>
 #include <qpa/qplatformdialoghelper.h>
 #include <qpa/qplatformtheme.h>
 
@@ -344,7 +341,7 @@ bool QskSkin::hasGraphicProvider() const
 
 QString QskSkin::dialogButtonText( int action ) const
 {
-    const auto theme = QGuiApplicationPrivate::platformTheme();
+    const auto theme = qskPlatformTheme();
 
     auto text = theme->standardButtonText( action );
     text = QPlatformTheme::removeMnemonics( text );
@@ -357,7 +354,7 @@ const int* QskSkin::dialogButtonLayout( Qt::Orientation orientation ) const
     // auto policy = QPlatformDialogHelper::UnknownLayout;
     auto policy = QPlatformDialogHelper::WinLayout;
 
-    if ( const auto theme = QGuiApplicationPrivate::platformTheme() )
+    if ( const auto theme = qskPlatformTheme() )
     {
         const QVariant v = theme->themeHint( QPlatformTheme::DialogButtonBoxLayout );
         policy = static_cast< QPlatformDialogHelper::ButtonLayout >( v.toInt() );
diff --git a/src/controls/QskSkinlet.cpp b/src/controls/QskSkinlet.cpp
index d3446d946..028492e2b 100644
--- a/src/controls/QskSkinlet.cpp
+++ b/src/controls/QskSkinlet.cpp
@@ -32,13 +32,9 @@
 #include <qquickwindow.h>
 #include <qsgsimplerectnode.h>
 
-QSK_QT_PRIVATE_BEGIN
-#include <private/qquickitem_p.h>
-QSK_QT_PRIVATE_END
-
 static inline QRectF qskSceneAlignedRect( const QQuickItem* item, const QRectF& rect )
 {
-    const auto transform = QQuickItemPrivate::get( item )->itemToWindowTransform();
+    const auto transform = item->itemTransform( nullptr, nullptr );
     if ( transform.type() > QTransform::TxTranslate )
         return rect;
 
diff --git a/src/graphic/QskGraphic.cpp b/src/graphic/QskGraphic.cpp
index e74540389..b11b7e317 100644
--- a/src/graphic/QskGraphic.cpp
+++ b/src/graphic/QskGraphic.cpp
@@ -19,7 +19,6 @@
 
 QSK_QT_PRIVATE_BEGIN
 #include <private/qpainter_p.h>
-#include <private/qpaintengineex_p.h>
 QSK_QT_PRIVATE_END
 
 static inline qreal qskDevicePixelRatio()
diff --git a/src/inputpanel/QskInputContext.cpp b/src/inputpanel/QskInputContext.cpp
index 2edb0e482..299199d64 100644
--- a/src/inputpanel/QskInputContext.cpp
+++ b/src/inputpanel/QskInputContext.cpp
@@ -13,14 +13,12 @@
 #include "QskQuick.h"
 #include "QskTextPredictor.h"
 #include "QskWindow.h"
+#include "QskPlatform.h"
 
 #include <qguiapplication.h>
 #include <qmap.h>
 #include <qpointer.h>
-
-QSK_QT_PRIVATE_BEGIN
-#include <private/qguiapplication_p.h>
-QSK_QT_PRIVATE_END
+#include <qthread.h>
 
 #include <qpa/qplatforminputcontext.h>
 #include <qpa/qplatformintegration.h>
@@ -183,7 +181,7 @@ static QPointer< QskInputContext > qskInputContext;
 
 static void qskSendToPlatformContext( QEvent::Type type )
 {
-    const auto integration = QGuiApplicationPrivate::platformIntegration();
+    const auto integration = qskPlatformIntegration();
 
     if ( const auto inputContext = integration->inputContext() )
     {
diff --git a/src/nodes/QskGradientMaterial.cpp b/src/nodes/QskGradientMaterial.cpp
index 9d9e3b66d..c36e9292d 100644
--- a/src/nodes/QskGradientMaterial.cpp
+++ b/src/nodes/QskGradientMaterial.cpp
@@ -11,11 +11,6 @@
 
 #include <qsgtexture.h>
 
-QSK_QT_PRIVATE_BEGIN
-#include <private/qrhi_p.h>
-#include <private/qdrawhelper_p.h>
-QSK_QT_PRIVATE_END
-
 #include <cmath>
 
 // RHI shaders are supported by Qt 5.15 and Qt 6.x
diff --git a/src/nodes/QskPlainTextRenderer.cpp b/src/nodes/QskPlainTextRenderer.cpp
index 92b80bd17..5c39cd378 100644
--- a/src/nodes/QskPlainTextRenderer.cpp
+++ b/src/nodes/QskPlainTextRenderer.cpp
@@ -12,8 +12,6 @@
 #include <qsgnode.h>
 
 QSK_QT_PRIVATE_BEGIN
-#include <private/qsgadaptationlayer_p.h>
-#include <private/qsgcontext_p.h>
 #include <private/qquickitem_p.h>
 QSK_QT_PRIVATE_END