--- libhfsp/src/unicode.c.orig	Tue Mar  5 20:50:29 2002
+++ libhfsp/src/unicode.c	Fri May  1 20:01:32 2015
@@ -15,8 +15,12 @@
  
 #include <stdlib.h>
 #include <endian.h>
+#if defined(__OpenBSD__)
+#include <stddef.h>
+#else
 #include <byteswap.h>
 #include <linux/string.h>
+#endif
 
 #define __USE_GNU
     /* need wcsrtomb */