SCXML compiler does not generate publicly accessible methods for signals (=> Invalid Q_PROPERTY declaration)

//
// Statemachine code from reading SCXML file 'test153.txml.scxml'
// Created by: The Qt SCXML Compiler version 1 (Qt 5.9.0)
// WARNING! All changes made in this file will be lost!
//

#ifndef W3C_ECMA_TEST153_TXML_H
#define W3C_ECMA_TEST153_TXML_H

#include <QScxmlStateMachine>
#include <QString>
#include <QVariant>

namespace w3c_ecma {

class test153: public QScxmlStateMachine
{
public:
    /* qmake ignore Q_OBJECT */
    Q_OBJECT
    Q_PROPERTY(bool s0 NOTIFY s0Changed)
    Q_PROPERTY(bool pass NOTIFY passChanged)
    Q_PROPERTY(bool fail NOTIFY failChanged)


public:
    test153(QObject *parent = 0); 
    ~test153();

private:
    struct Data;
    friend struct Data;
    struct Data *data;
};

} // w3c_ecma namespace.

Q_DECLARE_METATYPE(::w3c_ecma::test153*)

#endif // W3C_ECMA_TEST153_TXML_H

Q_PROPERTY(bool s0 NOTIFY s0Changed)

// no method for signal in header

Q_PROPERTY(bool s0 NOTIFY s0Changed)
// ...
Q_SIGNALS:
void s0Changed();