  We consider the effect of stellar activity, as measured by X-ray luminosity,
on metallicities of Solar-neighborhood F and G dwarfs derived from Stromgren
photometry. Rocha-Pinto & Maciel found evidence that Stromgren colors
systematically underpredict [Fe/H] for stars with extremely high Ca II H & K
emission. We investigate whether a recent photometric metallicity calibration
derived by Martell & Laughlin might be subject to this effect, and whether the
amount of underprediction could reliably be expressed as a function of log
(L_X/L_bol). Among those calibration stars used by Martell & Laughlin which are
also in the Bright Star Catalogue and detected in the ROSAT All-Sky Survey
there is no evidence for a correlation between photometric metallicity and
stellar activity. However, many of the "very active stars" on which the
Rocha-Pinto & Maciel result was based are members of interacting binaries or
are very young in age, and are not included in the X-ray sample that we are
using. Among normal dwarf stars it appears that stellar activity has little
effect on the metallicity calibration of Stromgren colors.
