DS18B20 have the same 1-wire ids in proteus

[yamadanao614]

I'm developing a temperature monitoring system and trying to model it in Proteus 8.1 SP1. When I try to execute rom search for multiple DS18B20 it give back just 1 ID, but if I add one DS1822 I can see two Ids so I assumed that proteus has just a fixed ID for 1-wire devices. Is it true? Is there any workarounds of this problem?

Here is the datesheet of ds18b20.