Will witches' huts be generated in a minecraft world that was created before they were (will be) added? [duplicate]

Question

Possible Duplicate:
Will new Minecraft features appear in existing worlds?

I'm a bit confused about how updating works. I imagine the already existing chunks will remain the same but new ones may contain the witch's hut, or do I have to create a brand-new world?

I'd hate to do that, I put weeks into my underwater fortress :)

Answer 1

I believe that they will spawn in newly generated areas. By that I mean they may be spawned when the game create more chunks.