  We measure the zero point of the Stanek (1996) extinction map by comparing
the observed (V-K) colors of 20 RR Lyrae stars (type ab) found in the MACHO
survey with their intrinsic (V-K)_0 colors as a function of period as
determined from nearby RR Lyrae stars. We find that the zero point of the
Stanek map should be changed by \Delta A_V = -0.11 +/- 0.05 mag, in excellent
agreement with the recent measurement of Gould, Popowski & Terndrup (1997)
using K giants.
