*** ckuus5.c	Sun Nov 24 16:20:50 1996
--- ckuus5.c	Thu Jan  1 09:01:41 1998
***************
*** 3351,3356 ****
--- 3351,3359 ----
  #ifdef __NetBSD__
      if (!prtopt(&lines,"__NetBSD__")) return;
  #endif /* __NetBSD__ */
+ #ifdef __OpenBSD__
+     if (!prtopt(&lines,"__OpenBSD__")) return;
+ #endif /* __OpenBSD__ */
  #ifdef __FreeBSD__
      if (!prtopt(&lines,"__FreeBSD__")) return;
  #endif /* __FreeBSD__ */
