QPushButton click

[qutron]

Hi, there.
I got little problem:
i connected QPushButton clicked() signal to my custom slot:

QObject::connect( ui->pushButton, SIGNAL(clicked()), this, SLOT(on_pushButton_clicked()));

QObject::connect( ui->pushButton, SIGNAL(clicked()), this, SLOT(on_pushButton_clicked()));

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but when I click on pushButton signal clicked() is sent twice ( on_pushButton_clicked() is called twice).
Any ideas?