Binding initWithCoder: constructor not being generated

I'm creating a binding for MLPAutoCompleteTextField, that contains a UITextField subclass declared this way:

[BaseType (typeof (UITextField),
    Delegates = new string [] { "AutoCompleteDataSource", "AutoCompleteDelegate" },
    Events = new Type[] { typeof(AutoCompleteTextFieldDataSource), typeof(AutoCompleteTextFieldDelegate) })]
public interface AutoCompleteTextField {

    // Method bindings go here
}

The problem that I'm getting is that the NSCoder constructor is not being generated, and if I try to create it manually adding the constructor binding:

[Export("initWithCoder:")]
IntPtr Constructor(NSCoder coder);

Then I get an error that the constructor already exists...

I'm using latest Alpha version if that matters. Attached the binding project (Makefile format).

Can anyone point me to the right direction?