diff --git a/lib/dns/rrl.c b/lib/dns/rrl.c
index 2c346e9bff..0d4e3e8a00 100644
--- a/lib/dns/rrl.c
+++ b/lib/dns/rrl.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012-2017  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2012-2018  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
@@ -766,7 +766,7 @@ add_log_str(isc_buffer_t *lb, const char *str, unsigned int str_len) {
 
 	isc_buffer_availableregion(lb, &region);
 	if (str_len >= region.length) {
-		if (region.length <= 0)
+		if (region.length == 0U)
 			return;
 		str_len = region.length;
 	}
diff --git a/util/copyrights b/util/copyrights
index b53ae116aa..5d2ddcc5a0 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -3655,7 +3655,7 @@
 ./lib/dns/rootns.c				C	1999,2000,2001,2002,2004,2005,2007,2008,2010,2012,2013,2014,2015,2016,2017
 ./lib/dns/rpz.c					C	2011,2012,2013,2014,2015,2016,2017,2018
 ./lib/dns/rriterator.c				C	2009,2011,2012,2015,2016
-./lib/dns/rrl.c					C	2012,2013,2014,2015,2016,2017
+./lib/dns/rrl.c					C	2012,2013,2014,2015,2016,2017,2018
 ./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	1999,2000,2001,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018
 ./lib/dns/soa.c					C	2000,2001,2004,2005,2007,2009,2016