The New York Times reports that a fire alarm on board the International Space Station today was caused by a software glitch on Russian computers that control navigation and functions of the station.

Clayton C. Anderson, an astronaut on the space station, called down to mission control and said, “We looked around and smelled around,” and found no evidence of fire.

The alarm came one day after the space station received a new set of solar panels, whose deployment went smoothly. Unlike the last time the solar panels were unfurled, back in September, when there was a three-hour delay caused by… a software glitch.