LR4 lens correction profiles for micro 4/3s lenses?

Hi,
Recently bought into the m43s system because of the compact fast primes (Lumix G 20 1.7 and Olympus 24 1.8) and it looks like there are no "built-in" lens profiles for either in LR4 when I check "enable lens corrections". I thought I read somewhere that the 20 1.7 requires correction as it has a significant amount of (barrel, iirc) distortion if not corrected, yet the RAW images look fine upon import -- is Lightroom doing something that does not require a profile? Am I missing something else?
Thanks!

they are build in. no need for lens profiles.
panasonic and olympus lenses for m43 provide lens correction data, raw files contain the parameters needed for raw conversion software, that´s part of the system design.

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LR4 lens correction profiles for micro 4/3s lenses?

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