diff --git a/servers/slapd/back-null/Makefile.in b/servers/slapd/back-null/Makefile.in
index 35825575cc..327ef9ab19 100644
--- a/servers/slapd/back-null/Makefile.in
+++ b/servers/slapd/back-null/Makefile.in
@@ -1,5 +1,7 @@
 # Makefile.in for back-null
 # $OpenLDAP$
+## This work is part of OpenLDAP Software <http://www.openldap.org/>.
+##
 ## Copyright 1998-2003 The OpenLDAP Foundation.
 ## All rights reserved.
 ##
diff --git a/servers/slapd/back-null/external.h b/servers/slapd/back-null/external.h
index 850531327c..89cd33f0df 100644
--- a/servers/slapd/back-null/external.h
+++ b/servers/slapd/back-null/external.h
@@ -1,7 +1,22 @@
-/*
- * Copyright 2002-2003 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2002-2003 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
  */
+/* ACKNOWLEDGEMENTS:
+ * This work was originally developed by Howard Chu for inclusion
+ * in OpenLDAP Software.
+ */
+
 #ifndef _NULL_EXTERNAL_H
 #define _NULL_EXTERNAL_H
 
diff --git a/servers/slapd/back-null/null.c b/servers/slapd/back-null/null.c
index c7ffc0eb23..94c097d341 100644
--- a/servers/slapd/back-null/null.c
+++ b/servers/slapd/back-null/null.c
@@ -1,7 +1,21 @@
 /* null.c - the null backend */
-/*
- * Copyright 2002-2003 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2002-2003 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was originally developed by Howard Chu for inclusion
+ * in OpenLDAP Software.
  */
 
 #include "portable.h"