If it pretends to be a query about what the correct shape is, it is not only out of place in a dictionary but is a trick question : it lacks words. Colloquially they ended up using both, in most cases the least bad is the second (the first would originate from an Italianism); but in a forum with prepared people this could generate an interesting debate. Not here.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
