Optical spectra of XMMSL1 J0740-85 taken on 2002-01-17 with the CTIO 1.5 m telescope for the 2MASS redshift survey (blue) and on 2014-05-05 with the Las Campanas, du Pont 100-inch telescope (red). The CTIO spectrum has been scaled by a factor 1.55 to match the Las Campanas spectrum at the red end. The lower panel shows the difference spectrum, indicating a featureless excess in blue flux in the 2014 observation. The apparent spike in the difference spectrum at ~4300 Å is caused by a spurious absorption feature in the CTIO spectrum.