I am trying to connect to a signal in a base class. The pointer is the type of the base class but points to an object of the derived class. My classes are declared similar to the following:

Qt Code: 
  1. class Base : public QObject
  2. {
  3.     Q_OBJECT
  4. public:
  5.     Base();
  6. signals:
  7.     void BaseSignal(char Arg);
  8. };
  9.  
  10. class DerivA : public Base
  11. {
  12.     Q_OBJECT
  13. public:
  14.     DerivA();
  15.  
  16.     void Alert() { emit BaseSignal('A') };
  17. };
  18.  
  19. class DerivB : public Base
  20. {
  21.     Q_OBJECT
  22. public:
  23.     DerivB();
  24.  
  25.     void Alert() { emit BaseSignal('B') };
  26. };
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Connect fails if I pass a DerivA or DerivB pointer to a function like the following:

Qt Code: 
  1. bool SomeObject::mbrConnect(Base *B)
  2. {
  3.      return QObject::connect(B, SIGNAL(BaseSignal(char)), this, SLOT(Handler(char)); 
  4. }
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It seems it is too smart for its own good, being able to identify the real type of the Base pointer in the Connect Fail output message. For example, passing mbrConnect a DerivA pointer would output the following:

Object::connect: No such signal DerivA::BaseSignal(char)
How do I solve this?