League One strugglers Leyton Orient have extended the loan spell of Burnley goalkeeper Alex Cisak until the end of the season.
The 25-year-old has made seven appearances since joining the O's on an initial one-month deal in February.
"I have been in a relegation battle with Oldham so I have experienced it before," Cisak told the Orient website.
"Hopefully I can bring that knowledge of when we stayed up to the boys here. We all have to stick together."
Orient, who reached the League One play-off final last season, are currently 21st in the table and one point from safety.