Using data from the June 1980 Current Population Survey, Morgan, Lye, and Condran 1988 reported that families with a daughter have a higher divorce risk than families with a son. They attribute this finding to the higher involvement of fathers in raising a son, which in turn promotes marital stability. We investigate the relation between gender composition of children and parents divorce risk with cross-national data from the Fertility and Family Survey. These data, which cover 16 European countries, Canada, and the United States, do not support a general hypothesis that sons contribute more to marital stability than daughters.