diff --git a/lib/dns/sdlz.c b/lib/dns/sdlz.c
index 6d0183320c..42cfbbda5b 100644
--- a/lib/dns/sdlz.c
+++ b/lib/dns/sdlz.c
@@ -1,5 +1,5 @@
 /*
- * Portions Copyright (C) 1999-2001, 2005-2017  Internet Systems Consortium, Inc. ("ISC")
+ * Portions Copyright (C) 1999-2001, 2005-2018  Internet Systems Consortium, Inc. ("ISC")
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -41,8 +41,6 @@
  * USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id$ */
-
 /*! \file */
 
 #include <config.h>
@@ -149,10 +147,10 @@ typedef struct sdlz_rdatasetiter {
 #define VALID_SDLZNODE(sdlzn)	VALID_SDLZLOOKUP(sdlzn)
 
 /* These values are taken from RFC 1537 */
-#define SDLZ_DEFAULT_REFRESH	(60 * 60 * 8)
-#define SDLZ_DEFAULT_RETRY	(60 * 60 * 2)
-#define SDLZ_DEFAULT_EXPIRE	(60 * 60 * 24 * 7)
-#define SDLZ_DEFAULT_MINIMUM	(60 * 60 * 24)
+#define SDLZ_DEFAULT_REFRESH	28800U		/* 8 hours */
+#define SDLZ_DEFAULT_RETRY	7200U		/* 2 hours */
+#define SDLZ_DEFAULT_EXPIRE	604800U		/* 7 days */
+#define SDLZ_DEFAULT_MINIMUM	86400U		/* 1 day */
 
 /* This is a reasonable value */
 #define SDLZ_DEFAULT_TTL	(60 * 60 * 24)
diff --git a/util/copyrights b/util/copyrights
index 060e559110..5fb7cd83b4 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -3657,7 +3657,7 @@
 ./lib/dns/rriterator.c				C	2009,2011,2012,2015,2016
 ./lib/dns/rrl.c					C	2012,2013,2014,2015,2016,2017
 ./lib/dns/sdb.c					C	2000,2001,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018
-./lib/dns/sdlz.c				C.PORTION	1999,2000,2001,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017
+./lib/dns/sdlz.c				C.PORTION	1999,2000,2001,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018
 ./lib/dns/soa.c					C	2000,2001,2004,2005,2007,2009,2016
 ./lib/dns/spnego.asn1				X	2006
 ./lib/dns/spnego.c				C	2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017