 He returned to Oxford for a second one-month loan on 24 November.On 6 January 2012, Guy was released from his contract with the MK Dons and during January had a trial with Scottish Premier League club St Mirren; on 24 March 2012, he had signed a pre-contract agreement with the club, linking up again with Tommy Craig, who coached Guy at Newcastle United.Guy scored his first goal for St Mirren in a 2–2 draw with Inverness Caley Thistle on 4 August 2012.