  We present a ~ 5-yr optical light curve of the recurrent Be/X-ray transient
A0538-66 obtained as a by-product of the MACHO Project. These data reveal both
a long-term modulation at P = 420.8 +/- 0.8 d and a short-term modulation at
16.6510 +/- 0.0022 d which, within errors, confirms the previously found
orbital period. Furthermore, the orbital activity is only seen at certain
phases of the 421 d cycle suggesting that the long-term modulation is related
to variations in the Be star envelope.
