Johnston no longer appears on the Chargers' Week 16 injury report and should be available to play Thursday against the Broncos, Daniel Popper of The Athletic reports.
Johnston (ankle) was listed as a non-participant on Monday's estimated practice report.
Johnston caught two of his four targets for 12 yards in the 17-13 win over the Falcons on Sunday.
Johnston failed to secure any of his five targets in Monday's 30-23 loss to the Ravens.
Johnston (ankle) practiced fully Thursday, Eric Smith of the Chargers' official site reports.
Johnston (ankle) was limited at practice Wednesday.
Johnston (ankle) is inactive for Sunday's game against the Saints.
Johnston (ankle) is listed as doubtful for Sunday's game against the Saints.
Johnston (ankle) remained sidelined at practice Thursday.
Johnston (ankle) remained sidelined at practice Wednesday, Daniel Popper of The Athletic reports.