It's the same ankle that has caused Roethlisberger trouble in the past.
Roethlisberger hurt the ankle when an offensive lineman stepped on him during goal-line practice. Roethlisberger had just completed a 20-yard touchdown pass to Emmanuel Sanders.
Roethlisberger then limped off the field and had the ankle iced.
"He's fine," Tomlin said, according to CBSSports.com. "Somebody stepped on his foot. You guys love the Ben updates."