Left panel: Photometry of the long cycle of OGLE-LMC-DPV-080 after the orbital cycle was removed. The WWZ analysis is shown in the lower left panel shows the evolution in the long period during the observation years. Middle panel: Long-cycle light curve assuming a constant period of 227 days. Right panel: Same as the middle panel, but considering a variable long period during the disentangling process. The dispersion of the fit to the light curve decreases considerably in the latter case.