'The Lost Constitution'

I'm reading William Martin's latest set-in-Boston historical novel,
'The Lost Constitution.' I'm getting hooked on the tome. But I did find one major historical inaccuracy in the opening pages set in contemporary Boston. See if you can spot it:
But there was no sign of life in the three-decker, just an old Plymouth minivan parked out front.
So Peter kept going down to the intersection, pulled into a Dunkin' Donuts, and bought half a dozen jelly crullers and raised glazed.
The answer is
here. Verified proof is
here. ... Maybe Martin can fix the mistake in the paperback edition. ...