 McAllister debuted on 25 January in a 0–0 draw at home to Mansfield Town and scored his first goal for Luton with the third goal in a 3–0 victory at home to Ebbsfleet United on 17 April.Luton finished fifth in the Conference Premier, and McAllister was introduced as a substitute in both legs of the play-off semi-final against Wrexham, which Luton won 3–2 on aggregate.He was introduced as a substitute again in the 2012 Conference Premier play-off Final at Wembley Stadium, in which Luton lost 2–1 to York City, and completed the loan spell with 17 appearances and one goal.