how to map interface type member in a class using fluent nhibernate Automapping

Question

how to map a class property variable of interface using automapping..is there a convention of some sort that i shoud add or override

public interface Iface1
{
   int id {get;set;}
   string Name {get; set;}
}

public class class1
{
  public virtual Iface1 myIface
}