[S/Fe] abundance ratios in galactic stars (black dots: Caffau et al. 2005a; crosses: Ryde et al. 2010; open squares: Jönsson et al. 2011; open diamonds: Takeda & Takada-Hida 2011), EMP stars (Spite et al. 2011, open circles), GCs from Sbordone et al. (2009, blue solid circles) and Caffau et al. (2005b, green solid squares), andour measurement in NGC 6397 (red star), where the open symbol denotes the 1D-LTE value and the solid one is corrected for NLTE and 3-D. Our measurement error is indicated in the lower left corner.