QVariant and qRegisterMetaType question

Q_DECLARE_METATYPE(Pkg)

qRegisterMetaType<Pkg>("Pkg");

In member function 'void MainWindow::FillPackagesList()':
mainWin.cpp:233: error: 'qRegisterMetaType' isnot a member of 'QMetaType' mainWin.cpp:234: error: no matching function for call to QVariant::QVariant(Pkg&)'

/usr/lib/qt/include/QtCore/qvariant.h:208: note: QVariant::QVariant(Qt::GlobalColor)
/usr/lib/qt/include/QtCore/qvariant.h:206: note: QVariant::QVariant(const QRegExp&)
/usr/lib/qt/include/QtCore/qvariant.h:204: note: QVariant::QVariant(const QLocale&)
/usr/lib/qt/include/QtCore/qvariant.h:203: note: QVariant::QVariant(const QUrl&)
/usr/lib/qt/include/QtCore/qvariant.h:201: note: QVariant::QVariant(const QRectF&)
/usr/lib/qt/include/QtCore/qvariant.h:200: note: QVariant::QVariant(const QRect&)

item->data(1,Qt::UserRole).value<Pkg>();

connect(packList,SIGNAL(itemClicked(QTreeWidgetItem*, int)), SLOT(setActualPackage(QTreeWidgetItem*)));