Kotlin constructor parameter without getter

I have the following code:

class ViewHolder(itemView: View, val ui: ViewUI)

I don't want that the field ui have a getter, but kotlin is generating it by default since it is a val defined in the constructor.

In the properties and fields document I found that I can generate a private getter with the following code

var setterVisibility: String = "abc"
    private set

But I can't find a way to do this in the constructor definition