Oil Pressure Switch - Leaking?

I've noticed a little puddling of oil around the base of the oil pressure switch/sensor and on the unit itself recently (KZ1000J). I cleaned up the unit and ran it for a while and couldn't detect an obvious source, so I was wondering if it is common to get seepage around the bolts or the base of the unit. I've had the bike now for a few hundred miles and just recently changed the oil.

Any experience??

take it out and put a little removeable ( blue ) loctite on it and put it back...steve