diff --git a/servers/slapd/back-hdb/Makefile.in b/servers/slapd/back-hdb/Makefile.in
index c0f5f8efb5..aabdd64c7b 100644
--- a/servers/slapd/back-hdb/Makefile.in
+++ b/servers/slapd/back-hdb/Makefile.in
@@ -1,5 +1,7 @@
 # Makefile for back-hdb
 # $OpenLDAP$
+## 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-hdb/back-bdb.h b/servers/slapd/back-hdb/back-bdb.h
index 233aaf6fe2..148d17d580 100644
--- a/servers/slapd/back-hdb/back-bdb.h
+++ b/servers/slapd/back-hdb/back-bdb.h
@@ -1,9 +1,22 @@
 /* back-bdb.h - hdb back-end header file */
 /* $OpenLDAP$ */
-/*
- * Copyright 2000-2003 The OpenLDAP Foundation, All Rights Reserved.
- * Copyright 2003 Howard Chu @ Symas Corp.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2003 The OpenLDAP Foundation.
+ * Portions Copyright 2003 Howard Chu @ Symas Corp.
+ * 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 _BACK_HDB_H_
diff --git a/servers/slapd/back-hdb/external.h b/servers/slapd/back-hdb/external.h
index 312e3fbb61..e6c41ceb00 100644
--- a/servers/slapd/back-hdb/external.h
+++ b/servers/slapd/back-hdb/external.h
@@ -1,8 +1,21 @@
 /* $OpenLDAP$ */
-/*
- * Copyright 2000-2003 The OpenLDAP Foundation, All Rights Reserved.
- * Copyright 2003 Howard Chu @ Symas Corp.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2003 The OpenLDAP Foundation.
+ * Portions Copyright 2003 Howard Chu @ Symas Corp.
+ * 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 _HDB_EXTERNAL_H