The full-back missed the goalless draw at Reading in midweek with a thigh problem and is expected to be out for up to two weeks.
However, Benitez at least has options with Jesus Gamez starting at right-back at the Madejski Stadium and Vurnon Anita having played there in the 3-1 victory at Huddersfield last Saturday evening.
Leading scorer Dwight Gayle will hope for a return to the starting line-up after two appearances as a substitute following his return from a hamstring problem, but midfielders Isaac Hayden (ankle) and Rolando Aarons (knee) are still out.
Fulham will again be without winger Floyd Ayite.
The Togo international has not featured since coming off during the second half of the 2-2 draw at Cardiff with what appeared to be a hamstring problem.
On-loan Chelsea midfielder Lucas Piazon continues his recovery from the broken jaw suffered in the same match.
Greek defensive midfielder Thanos Petsos has been out with a calf problem.