Natural Armor as a racial trait

[SailorLovins]

My race is nearly complete. All I have to do now is add it's natural armor. Said creature does not wear armor. Rather it has a thick hide. How do I get Fantasy Grounds to parse a racial trait with the following factors. Armor Class = 10 + Natural Armor Bonus (+1) + Dexterity Modifier? Nothing I am doing seems to be parsing.

[Zacchaeus]

Look at the racial trait for the Lizardfolk in Volo or the Draconic Resilience trait of the Sorcerer. Unless those are specifically hard coded I think the wording should work.