"w" just shows "a_ppp"

Hi I have my box set up for autoppp, which works just fine. The problem is that when I use the w command (to see who is on), it just shows every username as a_ppp. Is there any way I can get the username shown instead? I am authorising using pap-secrets anf my login.config has the user a_ppp. Thanx for any advice! John