--- sys/sys.h.orig	Wed Jul 29 02:05:15 1998
+++ sys/sys.h	Wed Jul 29 02:04:37 1998
@@ -30,7 +30,7 @@
  || defined(MACH) \
  || defined(NeXT) \
  || defined(bsdi) \
- || defined(__FreeBSD__)
+ || defined(__FreeBSD__) || defined(__OpenBSD__)
 #define USE_SGTTY
 #define HAS_SELECT
 #endif
@@ -69,7 +69,7 @@
 #define READYCC(fp)	(fp->_egptr - fp->_gptr)
 #endif
 #else
-#if defined(bsdi) || defined(__FreeBSD__)
+#if defined(bsdi) || defined(__FreeBSD__) || defined(__OpenBSD__)
 #define READYCC(fp)	(fp->_r)
 #else
 #define READYCC(fp)	(fp->_cnt)