Shillelagh + Polearm Master: damage with a staff still be a d4 or would it be a d8?

@pukunui81 Shillelagh + Polearm Master: would the dmg for the extra attack with a staff still be a d4 or would it be a d8? A d4.

— Jeremy Crawford (@JeremyECrawford) January 31, 2017

@pukunui81OK. Would you still get to use Wis for atk/dmg, though? Yes.

— Jeremy Crawford (@JeremyECrawford) January 31, 2017