Cannot create const shared pointers for classes derived from QEnableSharedFromThis

#include <QEnableSharedFromThis>

class MyClass : public QEnableSharedFromThis<MyClass> { };

int main()
{
    QSharedPointer<const MyClass> myObject(new MyClass);
}

In file included from qtbase/include/QtCore/qsharedpointer_impl.h:1:0,
                 from qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer.h:42,
                 from qtbase/include/QtCore/qsharedpointer.h:1,
                 from qtbase/include/QtCore/QEnableSharedFromThis:1,
                 from /tmp/sharedfromthis/main.cpp:1:
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h: In instantiation of ‘QtNamespace::QWeakPointer<T>& QtNamespace::QWeakPointer<T>::operator=(const QtNamespace::QSharedPointer<X>&) [with X = const MyClass; T = MyClass]’:
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:749:21:   required from ‘void QtNamespace::QEnableSharedFromThis<T>::initializeFromSharedPointer(const QtNamespace::QSharedPointer<X>&) const [with X = const MyClass; T = MyClass]’
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:502:9:   required from ‘void QtNamespace::QSharedPointer<T>::enableSharedFromThis(const QtNamespace::QEnableSharedFromThis<X>*) [with X = MyClass; T = const MyClass]’
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:527:29:   required from ‘void QtNamespace::QSharedPointer<T>::internalConstruct(T*, Deleter) [with Deleter = QtNamespace::QtSharedPointer::NormalDeleter; T = const MyClass]’
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:312:24:   required from ‘QtNamespace::QSharedPointer<T>::QSharedPointer(T*) [with T = const MyClass]’
/tmp/sharedfromthis/main.cpp:7:55:   required from here
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:81:35: error: no matching function for call to ‘qt_sharedpointer_cast_check(const MyClass*)’
     qt_sharedpointer_cast_check<T>(static_cast<X *>(0))
                                   ^
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:667:9: note: in expansion of macro ‘QSHAREDPOINTER_VERIFY_AUTO_CAST’
         QSHAREDPOINTER_VERIFY_AUTO_CAST(T, X); // if you get an error in this line, the cast is invalid
         ^
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:79:34: note: candidate: template<class T> void QtNamespace::qt_sharedpointer_cast_check(T*)
 template<typename T> inline void qt_sharedpointer_cast_check(T *) { }
                                  ^
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:79:34: note:   template argument deduction/substitution failed:
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:81:35: note:   cannot convert ‘0u’ (type ‘const MyClass*’) to type ‘MyClass*’
     qt_sharedpointer_cast_check<T>(static_cast<X *>(0))
                                   ^
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:667:9: note: in expansion of macro ‘QSHAREDPOINTER_VERIFY_AUTO_CAST’
         QSHAREDPOINTER_VERIFY_AUTO_CAST(T, X); // if you get an error in this line, the cast is invalid
         ^
In file included from qtbase/include/QtCore/qsharedpointer_impl.h:1:0,
                 from qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer.h:42,
                 from qtbase/include/QtCore/qsharedpointer.h:1,
                 from qtbase/include/QtCore/QEnableSharedFromThis:1,
                 from /tmp/sharedfromthis/main.cpp:1:
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:668:20: error: invalid conversion from ‘const MyClass*’ to ‘MyClass*’ [-fpermissive]
         internalSet(o.d, o.data());
                    ^
qtbase/include/QtCore/../../../../src/qtbase/src/corelib/tools/qsharedpointer_impl.h:709:17: note:   initializing argument 2 of ‘void QtNamespace::QWeakPointer<T>::internalSet(QtNamespace::QWeakPointer<T>::Data*, T*) [with T = MyClass; QtNamespace::QWeakPointer<T>::Data = QtNamespace::QtSharedPointer::ExternalRefCountData]’
     inline void internalSet(Data *o, T *actual)
                 ^