No NAS-Port seen warning

Hey, I keep getting a warning message in my Radius setup... WARNING: Attribute NAS-Port was not found in request, unique ID MAY be inconsistent This is true enough. But I am sending a slightly different attribute: 'Quintum-NAS-Port'. Do I have control over this 'NAS-Port prefix? Or can I make rlm_acct_unique look for Quintum-NAS-Port instead of just NAS-Port? Any help appreciated. Thanks, Rob