Mustache or Moustache?

"A moustache (American English: mustache;[1] pronounced /məˈstɑːʃ/ (U.K.), /ˈmʌstæʃ/ (U.S.)) is facial hair grown on the outer surface of the upper lip. It may or may not be accompanied by a beard, hair around the entire face.

The word "moustache" derives from 16th century French moustache, which in turn is derived from the Italian mostaccio (14th century), dialectal mustaccio (16th century), from Medieval Latin mustacium (8th century), Medieval Greek moustakion (attested in the 9th century), which ultimately originates as a diminutive of Hellenistic Greek mustax (mustak-) "moustache", probably derived from Hellenistic Greek mullon "lip".[2]"

http://en.wikipedia.org/wiki/Moustache


So technically Moustache. But I'm lazy, also my spell check is set to American.