$OpenBSD: patch-include_rio_internal_h,v 1.2 2010/05/20 09:58:36 espie Exp $
--- include/rio_internal.h.orig	Tue Jan 20 08:41:20 2004
+++ include/rio_internal.h	Wed May 19 19:19:24 2010
@@ -547,6 +547,8 @@ unsigned int    crc32_rio            (unsigned char *,
 u_int32_t bswap_32(u_int32_t);
 #elif defined (__NetBSD__)
 #define bswap_32(x) bswap32(x)
+#elif defined (__OpenBSD__)
+#define bswap_32(x) swap32(x)
 #endif
 
 #ifndef HAVE_LIBGEN_H
@@ -563,10 +565,14 @@ char *basename(char *x);
 
 #include <machine/endian.h>
 
-#else
+#elif defined (__OpenBSD__)
 
 #include <sys/endian.h>
+
+#else
+
 #include <sys/bswap.h>
+#include <sys/endian.h>
 
 #endif