The Trump administration might be exaggerating their employment figures, Federal Reserve chair Jerome Powell warned Wednesday.

In a press conference, Powell said that staffers at the Fed think that the government could be overestimating the number of jobs created by 60,000 each month. With published figures stating that the U.S. has added an average of 40,000 jobs each month since April, the true numbers could be closer to a loss of 20,000 jobs a month.

“We think there’s an overstatement in these numbers,” Powell said at the conference, which followed a policy meeting at the central bank.