-AC_ARG_WITH(expat_includes, [ --with-expat-includes=DIR Use Expat includes in DIR], expat_includes=$withval, expat_includes=yes)
-AC_ARG_WITH(expat_lib, [ --with-expat-lib=DIR Use Expat library in DIR], expat_lib=$withval, expat_lib=yes)
+AC_ARG_WITH(expat-includes, [ --with-expat-includes=DIR Use Expat includes in DIR], expat_includes=$withval, expat_includes=yes)
+AC_ARG_WITH(expat-lib, [ --with-expat-lib=DIR Use Expat library in DIR], expat_lib=$withval, expat_lib=yes)