Muse was signed to the active roster by Atlanta on Wednesday, William McFadden of the Falcons' official site reports.
Muse was recently elevated from the practice squad ahead of Sunday's 20-13 loss to Pittsburgh. After reverting to the practice squad Monday, the 27-year-old is now back on the 53-man roster. However, with Kyle Pitts, Charlie Woerner and Austin Hooper healthy, Muse will presumably continue to spend most of his time on special teams.