--- include/mconfig.h-	Wed Dec 17 08:33:34 1997
+++ include/mconfig.h	Wed Dec 17 08:33:37 1997
@@ -439,7 +439,7 @@
 #	define	USLEEPISVOID
 #endif
 
-#if defined(mips) && !(defined(ultrix) || defined(sony) || defined(sgi))
+#if defined(mips) && !(defined(ultrix) || defined(sony) || defined(sgi) || defined(__OpenBSD__))
 #	define	HAVE_COFF
 #	define	HAVE_UNISTD_H
 #	define	HAVE_USGSHM