diff --git a/src/main.cpp b/src/main.cpp
index fdfd195f3..2034816d4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -29,7 +29,6 @@ int main(int argc, char *argv[])
     QGuiApplication::setQuitOnLastWindowClosed(false);
 
     QGuiApplication app(argc, argv);
-    qRegisterMetaType<QW_NAMESPACE::qw_buffer*>("qw_buffer*");
 
     app.setOrganizationName("deepin");
     app.setApplicationName("treeland");
diff --git a/src/modules/prelaunch-splash/prelaunchsplash.h b/src/modules/prelaunch-splash/prelaunchsplash.h
index 2b9d59404..9dc1d04d4 100644
--- a/src/modules/prelaunch-splash/prelaunchsplash.h
+++ b/src/modules/prelaunch-splash/prelaunchsplash.h
@@ -5,12 +5,12 @@
 
 #include <wayland-server-core.h>
 #include <wserver.h>
-
 #include <qwbuffer.h>
+#include <memory>
 
 #include <QObject>
 
-#include <memory>
+Q_MOC_INCLUDE(<qwbuffer.h>)
 
 WAYLIB_SERVER_USE_NAMESPACE
 QW_USE_NAMESPACE
@@ -23,7 +23,6 @@ QW_BEGIN_NAMESPACE
 class qw_display;
 class qw_buffer;
 QW_END_NAMESPACE
-Q_DECLARE_OPAQUE_POINTER(QW_NAMESPACE::qw_buffer *)
 
 class PrelaunchSplashPrivate;
 struct wl_global;
@@ -52,3 +51,5 @@ class PrelaunchSplash
 private:
     std::unique_ptr<PrelaunchSplashPrivate> d;
 };
+
+Q_DECLARE_OPAQUE_POINTER(QW_NAMESPACE::qw_buffer*)
diff --git a/waylib/src/server/qtquick/wbufferitem.h b/waylib/src/server/qtquick/wbufferitem.h
index d3f7caac8..6a5f69b2d 100644
--- a/waylib/src/server/qtquick/wbufferitem.h
+++ b/waylib/src/server/qtquick/wbufferitem.h
@@ -6,15 +6,13 @@
 #include <wglobal.h>
 #include <wtextureproviderprovider.h>
 #include <qwglobal.h>
+#include <qwbuffer.h>
+
+Q_MOC_INCLUDE(<qwbuffer.h>)
 
 #include <QQuickItem>
 #include <QVariant>
 
-QW_BEGIN_NAMESPACE
-class qw_buffer;
-QW_END_NAMESPACE
-Q_DECLARE_OPAQUE_POINTER(QW_NAMESPACE::qw_buffer*)
-
 QT_BEGIN_NAMESPACE
 class QSGTextureProvider;
 QT_END_NAMESPACE
@@ -60,3 +58,4 @@ class WAYLIB_SERVER_EXPORT WBufferItem : public QQuickItem, public virtual WText
 WAYLIB_SERVER_END_NAMESPACE
 
 Q_DECLARE_METATYPE(WAYLIB_SERVER_NAMESPACE::WBufferItem*)
+Q_DECLARE_OPAQUE_POINTER(QW_NAMESPACE::qw_buffer*)