Auto rules in the North American Free Trade Agreement that President Trump wants changed may be altered in the renegotiations among the U.S., Mexico, and Canada, a Mexican official involved in the talks said, indicating that the Trump administration is making some progress on one of its key goals.

“You have to be very prudent on what the level is because you can shoot yourself in the foot,” Mexican Economic Minister Ildefonso Guajardo said on a local news show, according to Reuters. “Let’s put a realistic integration figure that everyone agrees on, it’s not going to be the current 62.5 percent … but it also can’t be 85.”