No such signal QRadioButton::toggled()

[bpetty]

The Title Says it all... "Object::connect: No such signal QRadioButton::toggled()"

I was looking through the docs on QRadioButton and it inherits:
void QAbstractButton::toggled ( bool checked ) [signal]

So I tried to create the following connection like so:

...
connect(ui.rbManualMode, SIGNAL(toggled()), this, SLOT(toggleManualTab()));
}
 
void ConfigurationForm::toggleManualTab()
{
    bool bEnableTab = ui.rbManualMode->isChecked();
 
    ui.twConfig->setTabEnabled( 1, bEnableTab );
}

...
connect(ui.rbManualMode, SIGNAL(toggled()), this, SLOT(toggleManualTab()));
}

void ConfigurationForm::toggleManualTab()
{
    bool bEnableTab = ui.rbManualMode->isChecked();

    ui.twConfig->setTabEnabled( 1, bEnableTab );
}

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I am trying to enable / dissable a tab based on a radio button choice. For some reason it can not send a toggled() signal. I must be missing something fundemental here because it seems too easy to mess up.