The 22-year-old has made four appearances for the Shots so far, scoring one goal in the 2-1 win over Welling.
Since signing from Histon in the sumer of 2013, Stevenson has played just 18 times for Luton, although did make his Football League bow this season, and netted his only goal, in the 2-1 win at Hartlepool back in October.