General manager Don Maloney announced the move before Thursday night's game at St. Louis.
The 27-year-old Johnson had four goals and two assists in 17 games after being recalled from the minors.
He has played in two games for the Portland Pirates this season and five games with the ECHL's Idaho Steelheads.
Johnson was a third-round draft pick of Pittsburgh in 2004 and has 14 career goals and 23 assists in 104 NHL games.
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