*** lib/system.h.org	Thu Sep 19 20:48:59 2002
--- lib/system.h	Thu May  8 23:16:32 2003
***************
*** 14,19 ****
--- 14,25 ----
  #include <sys/types.h>
  #include <sys/stat.h>
  
+ #if defined(__SCO_VERSION__)
+ # ifndef S_ISSOCK
+ #  define S_ISSOCK S_ISNAM
+ # endif
+ #endif
+ 
  #ifdef STAT_MACROS_BROKEN
  #undef S_ISBLK
  #undef S_ISCHR