Spell-like Ability casting stat for DCs?

[Heretek]

Ran into a bit of confusion while I was looking at the Dhampir and the Heir to Undying Nobility alternate racial trait.

Normally Dhampirs have Detect Undead, but this trait replaces it with Command, and Charm Person. Typically a SLA DC like most spells is based on 10 + spell level + casting stat, however if this is a racially granted SLA... what is the casting stat? WIS, INT, or CHA?

[_Ozy_]

CHA I believe.

[dragonhunterq]

Charisma - tucked away in the universal monster rules

(unless specified otherwise of course)

[Heretek]

Thanks guys, good to know.