  The MACHO Project collected photometry of many RR Lyrae stars from its
observations of the Milky Way's bulge. We examined the lightcurves of 3256
stars identified as RRab Lyr variables by \cite{Kund2008}, subtracting an
empirical model of the pulsation lightcurve and searching for periodic
variation in the residuals. There are no systems which show the brief dips in
light characteristic of detached eclipsing binary systems. We discuss the
results for objects which show the largest residual periodic modulation, most
of which are probably due to aliases of the fundamental period.
