The French defender was a doubt before the Gunners' 1-0 win at Sunderland on Saturday, having been forced off while on duty with his country during the week.
The 27-year-old then aggravated the problem during the warm-up at the Stadium of Light, but Wenger insists that the issue is not serious.
"It's a calf problem. We think it's a question of days [until he returns] because he had a positive scan," Wenger revealed.
"He [came off for France] at half time [on Wednesday] and we decided to give him a trial in the warm up.
"He was not good enough. I don't think it's long-term."
Arsenal host Blackburn Rovers in the FA Cup next weekend.