Orakpo was listed as limited in practice Thursday. He was mostly a spectator during the portion open to reporters.
Orakpo was injured in the preseason game against the Baltimore Ravens on Aug. 23. He says his ankle is "getting better" and that he'll be "good to go" Sunday against Houston.
The three-time Pro Bowl outside linebacker had 10 sacks last year and is expected to be a part of a multi-pronged attack - with Ryan Kerrigan, Jason Hatcher and rookie Trent Murphy - to put pressure on quarterbacks this season.
Orakpo signed a one-year deal worth about $11.5 million this season after the Redskins designated him as their franchise player.