Johnson (ankle) is listed as active Sunday against the 49ers, Tim Twentyman of the Lions' official site reports.

Over the last two games, Johnson has amassed six total targets, which he surpassed in every contest but Week 1 prior to the current dry spell. Throughout his career, he's generally shrugged off injuries to post favorable lines, so perhaps his balky ankle is more serious than he's letting on, or father time is catching up to him. With Golden Tate tearing it up since the Lions' Week 9 bye, Johnson may be presented with lax coverage schemes, but the 49ers have locked up vaunted Arizona, Chicago, and Cincinnati wideouts in the last four games, allowing 14.6 YPC but no touchdowns during that run.