diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c
index 910164ba0b2..554da179c06 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c
@@ -20,6 +20,9 @@
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Portions Copyright 2012 Sergey Kandaurov <pluknet@FreeBSD.org>
+ * Portions Copyright 2012 Martin Matuska <mm@FreeBSD.org>
  */
 
 #include <sys/zfs_context.h>