Deep binding not working

Code:

        viewModel.bind({bindTo: '{myObj}', deep: true}, function(data) {
            console.log('bind called with ' + data);
        });


        var myObj = {
            name: 'name1'
        }


        viewModel.set('myObj', myObj);
        viewModel.notify();


        viewModel.set('myObj.name', 'name2')
        viewModel.notify();

The second viewModel.set() call does not trigger the bind callback for me. I thought "deep: true" would trigger it for any properties. Or, am I doing something wrong?