We revisited the BeppoSAX observation of SAX J0635+0533, which was suggeste
d as a possible counterpart to the gamma-ray source 2EG J0635+0521. We have
discovered a 33.8 ms pulsation from the source and derived an improved pos
ition, consistent with the location of the Be star proposed as a binary com
panion. We interpret the periodicity as the spin period of a neutron star i
n a binary system with a Be companion.