--- include/my_global.h.orig	Fri Feb 13 19:52:18 2009
+++ include/my_global.h	Thu Mar  5 10:10:31 2009
@@ -55,6 +55,10 @@
 #define USE_PRAGMA_INTERFACE
 #endif
 
+#if defined(__OpenBSD__) && (OpenBSD >= 200411)
+#define HAVE_ERRNO_AS_DEFINE
+#endif
+
 #if defined(i386) && !defined(__i386__)
 #define __i386__
 #endif