You have three options:
Wait for him to outgrow it - and hope he does.
Wake him up at least once, maybe twice a night, to pee until he starts waking up on his own. If you try this, wake him up at the same time each night so his body develops a rhythm.
Get an alarm that sounds when he starts to pee. You can find these on line - search for "wee alarm". The idea is to teach his brain to wake up when the body has to "go".
at 12:12 AM on Jun. 20, 2008