Problem with Signal/Slot connections in derived classes

I have a problem with Signal/Slot connections when a slot exists in a derived class, but not the baseclass. Imagine the following code, where class A is derived from QObject, and class B is derived from class A.

Class A:

Code:

---

#include <QObject>
 
class A : public QObject
{
	Q_OBJECT
 
public:
	A(QObject *parent = NULL);
	virtual ~A() {};
};
 
A::A(QObject *parent) : QObject(parent)
{
}

---

Class B:

Code:

---

#include "A.h"
 
class B : public A
{
public:
	B(QObject *parent = NULL);
	virtual ~B() {};
 
public slots:
void mySlot();
};
 
B::B(QObject *parent) : A(parent)
{
}
 
void B::mySlot()
{
	qDebug("B::mySlot called");
}

---

Now I want to create an instance of class B, and connect the slot defined in class B (but not in class A!) to a signal.

Code:

---

QApplication app(argc, argv);
B b;
QObject::connect(&app, SIGNAL(aboutToQuit()), &b, SLOT(mySlot()));

---

Instead of the slot being called, I get the following warning in the debug output:

Code:

---

WARNING:	Object::connect: No such slot A::mySlot()
WARNING:	Object::connect:  (sender name:   'tst_Qt')

---

Why does it try to connect to A::mySlot()? b is clearly an instance of B, not of A.
Qt is version 4.3.1. I'd be very happy about any hint to solve this problem..

Add the Q_OBJECT macro to B also.

Ouch. That was really a stupid mistake. Thanks for your help!