The world's biggest hamburger chain on Wednesday said sales at restaurants open at least 13 months rose 2.4 percent in the United States.
Same-restaurant sales were up 2.3 percent in Europe and 4.3 percent in its Asia/Pacific, Middle East and Africa (APMEA) unit.
Analysts polled by Thomson Reuters were expecting May same-restaurant sales to rise 2.8 percent in the United States, 4.2 percent in Europe and 3.4 percent in APMEA, according to Thomson Reuters I/B/E/S.
Shares fell $1.39 in premarket trading from a close on Tuesday of $81.14.
(Reporting by Phil Wahba, additional reporting by Lisa Baertlein, editing by Gerald E. McCormick)