Gov. John Kasich, who had vowed not to vote for Republican presidential nominee Donald Trump, voted Monday by absentee ballot.

His choice? Sen. John McCain of Arizona.

Chris Schrimpf, the governor’s political spokesman, confirmed the write-in vote to cleveland.com and said Kasich voted straight-ticket Republican on the rest of his ballot. Schrimpf added that Kasich was comfortable picking McCain, the 2008 GOP nominee for president, over Trump, Democrat Hillary Clinton and Libertarian Gary Johnson, a former Republican on the ballot as a nonpartisan candidate.

The vote essentially is a symbolic gesture. Because McCain is not among the 18 certified write-in candidates in Ohio, Kasich’s vote for president will not count.