$OpenBSD$
--- src/lo_types_internal.h.orig	Mon Jan  2 19:04:53 2012
+++ src/lo_types_internal.h	Mon Jan  2 19:05:09 2012
@@ -6,6 +6,7 @@
 #endif
 
 #ifdef HAVE_SYS_SOCKET_H
+#include <sys/types.h>
 #include <sys/socket.h>
 #endif
 
