The goalkeeper's deal was due to expire on 30 June but he has committed to playing beyond that date..
Due to a change in regulations caused by the COVID-19 pandemic, clubs are allowed to re-engage out of contract players on a short-term basis to encompass the remaining matches of the season.
Camp has been Blues first choice number one for the past two campaigns.
This season he came under serious challenge from Connal Trueman but regained his place in the team at the turn of the year.
Camp - who has made more career appearances in England's Championship than any other player - was memorably Blues penalty hero in the FA Cup shoot-out against Coventry City.
Meanwhile, Blues have agreed to extend David Stockdale's loan to encompass Wycombe Wanderers' League One Play-Off campaign.