--- ospfd/ospf_packet.c.orig	2011-11-09 17:13:18.000000000 +0400
+++ ospfd/ospf_packet.c	2011-11-09 17:15:31.000000000 +0400
@@ -2116,7 +2116,7 @@
   
   ip_len = iph->ip_len;
   
-#if !defined(GNU_LINUX) && (OpenBSD < 200311)
+#if !defined(GNU_LINUX) && (OpenBSD < 200311) && (__FreeBSD_version < 900045)
   /*
    * Kernel network code touches incoming IP header parameters,
    * before protocol specific processing.