American Airlines is misleading its employees when it said not to worry about their pensions, a federal agency said on Thursday.

The Pension Benefit Guaranty Corp. said the airline itself has estimated that 13,000 current or retired employees will have their pension cuts.

“American Airlines is telling their workers and retirees not to worry, but they should,” said J. Jioni Palmer, PBGC’s director of communications. “American said nothing’s been decided yet, but didn’t even bother to pretend that it was trying to preserve its employees’ pensions.”