The White House has been forced to correct yet another error by President Biden after he said Americans who use renewable energy to power their homes could save “about $500 a month on average.”

Biden made the claim during remarks announcing the planned release of 180 million barrels of oil from the Strategic Petroleum Reserve over the next six months. The speech included a plug for the administration’s proposed green energy programs currently before Congress.

“If your home is powered by safer, cheaper, cleaner electricity, like solar or heat pumps, you can save about $500 a month on average,” the president said.

Hours after the speech, the White House sent out a transcript of the president’s remarks with the word “month” crossed out and the word “year” added in brackets.

The correct version of Biden’s pitch also appeared in a fact sheet sent out to reporters ahead of the speech.