That's right! If you haven't heard the story before, additional fossil fragments identified the tooth as coming from a pig (or peccary)! Creationists like to point out that this is a case where the pig made a monkey out of the secular scientist!
Unfortunately, we have been force fed many similar monkey-man fairy tales over the last 100 years. Many of these fables have been discredited by even secular evolutionist scientists, yet they still pervade our media and education system. If you are one of those who have been brainwashed by a scientific dogma fueled more by humanist naturalism than objective evidence, I highly recommend you consider reading the book Bones of Contention by Marvin Lubenow, the most exhaustive study of supposed ape-man fossils I have come across.
"The Hesperopithecus tooth is like the still, small voice. Its sound is by no means easy to hear... This little tooth speaks volumes of truth, in that it affords evidence of man's descent from apes." - Professor Osborn (quoted not long before having to order the day's lunch special of crow).