Nope, you just need to flip the "Use Persistent Mapping" switch. In fact, we flip it by default for you.
Here's the info from the refpage:
The live.object object has a special entry in its inspector labelled "Use Persistent Mapping". This setting, when enabled, causes the id associated with the object to persist when the Live document is saved and restored, and when the Max Device is moved between the Live application and the Max editor, or within the Live Set. Beginning in Live 8.2.2, Live API ids remain persistent between launches of Live, which in conjunction with the Persistence feature of live.object , live.observer and live.remote~ , makes it possible to create simpler devices which retain their association with elements in the Live user interface.