--- membench.c.orig	2000-07-31 19:23:27.000000000 +0200
+++ membench.c	2004-06-03 09:40:49.000000000 +0200
@@ -42,7 +42,7 @@ extern char *_sys_errlist[];
 #define sys_errlist _sys_errlist
 #endif
 
-#ifdef SunOS
+#if defined(SunOS) || defined(__OpenBSD__)
 extern		sigjmp_buf	env;
 #else
 extern		jmp_buf	env;