South Korean President Yoon Suk-yeol said for the first time Wednesday that if North Korea’s nuclear threat grows, South Korea would consider building nuclear weapons of its own or ask the United States to redeploy them on the Korean Peninsula.

Speaking during a joint policy briefing by his defense and foreign ministries Wednesday, Yoon was quick to add that building nuclear weapons was not yet an official policy. He stressed that South Korea would for now deal with North Korea’s nuclear threat by strengthening its alliance with the United States.

Such a policy includes finding ways to increase the reliability of Washington’s commitment to protect its ally with all of its defense capabilities, including nuclear weapons.