President Trump and North Korean dictator Kim Jong Un have edged closer to a historic handshake, tentatively set for Sunday across the border between the two Koreas.

“I’m going to the DMZ,” Trump told business leaders Sunday in South Korea, where he is meeting with President Moon Jai-in.

“I understand they want to meet, and I’d love to say hello,” he said, adding that any meeting would be “very short.”

“Virtually a handshake, but that’s OK,” he said. “A handshake means a lot.”

The details of what would be the third meeting between the two leaders were being worked out, he said.

Trump has been teasing the prospect of a “handshake” meeting across the DMZ since tweeting the prospect before leaving the G-20 summit in Osaka, Japan on Saturday.

But he’d downplayed the possibility. “All I did is put out a feeler, if you’d like to meet,” he said of his invitation to Kim. “I just thought of it this morning.”

That timing is at odds with Trump’s comments to The Hill newspaper earlier in the week, when he first said he planned to visit the DMZ and “might” meet with Kim.

The Hill later reported that it had withheld Trump’s comments at the time, in deference to White House security concerns.

While still in Japan, Trump said he would “feel very comfortable” crossing the border into North Korea should the meeting take place.

Still, he would become the first US president ever to step into North Korea.

The meeting would not allow much time for diplomacy, and would be “just a quick hello,” he said on landing in South Korea.