President Joe Biden slipped up during his joint press conference with the prime minister of Japan, saying he’s “in the 20th century” before quickly correcting himself to say 21st.

Biden was answering a question on the Arizona state supreme court ruling that brought back an 1864 abortion law.

“What do you say to the people of Arizona right now who are witnessing a law go in place that dates back to the Civil War?” a reporter asked.

Biden was ready with an answer, at least a first.

“Elect me,” he said immediately. “I’m in the 20, 20th century — 21st century. Not back then. They [Arizona] weren’t even a state.”

The president tried to continue his answer but was shouted down by other reporters attempting to ask questions.

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Arizona became a state in 1912. The 21st century began on Jan. 1, 2001.

Biden has campaigned heavily on the issue of abortion access as he seeks a second term in office, while former president Donald Trump has tried to stake out a more nuanced position while focusing more heavily on issues like immigration and the economy.