US national security adviser John Bolton added a new condition on Sunday to the U.S. withdrawal from Syria, saying Turkey must agree to protect the United States’ Kurdish allies, Reuters reported.

Bolton, on a trip to Israel and Turkey, said he would stress in talks with Turkish officials, including President Tayyip Erdogan, that Kurdish forces must be protected.

Ahead of talks with Israeli officials, he told reporters the pullout would be done in a way that guaranteed the Islamic State jihadist group “is defeated and is not able to revive itself and become a threat again.”

And it would be carried out in such a way as to “make sure that the defense of Israel and our other friends in the region is absolutely assured, and to take care of those who have fought with us against ISIS and other terrorist groups.”

Asked whether a U.S. withdrawal would not take place in Syria until Turkey guaranteed the Kurdish fighters would be safe, Bolton said: “Basically, that’s right.”