An issue with glass at the in-construction Government Center T stop is nothing to worry about, officials said this week.

The glass on the big structure in the plaza, called a “headhouse,” will need to be replaced after showing signs of fogging, MBTA’s General Manager Frank DePaola said at a Monday board meeting, according to reports. That means moisture is getting between the building’s double-panes.

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The city won’t have to pay for the replacement – the contractor for the project, Barletta Heavy Division, will, according to Michael Verseckes, MassDOT spokesperson.

“The glass windows delivered to Government Center for the station reconstruction project have arrived with a sealant to keep moisture out of double paned glass that failed,” Verseckes told Metro via email. “It appears to be a manufacturing issue and as such the T will not be responsible for the cost of replacement.”

It also won’t delay the station’s opening, planned for spring, Verseckes said.

All 358 glass panels will need to be replaced – anywhere between 50 and 100 at a time, he said.