diff --git a/bin/tests/rbt_test.c b/bin/tests/rbt_test.c
index c0586fc12c..f536c9fe47 100644
--- a/bin/tests/rbt_test.c
+++ b/bin/tests/rbt_test.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1999-2001, 2004, 2005, 2007, 2009, 2011, 2012, 2014-2016  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1999-2001, 2004, 2005, 2007, 2009, 2011, 2012, 2014-2016, 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
@@ -177,7 +177,7 @@ detail(dns_rbt_t *rbt, dns_name_t *name) {
 		printf("\n  result from dns_rbtnodechain_current: %s\n",
 		       dns_result_totext(result));
 
-	printf("  level_matches = %d, level_count = %d\n",
+	printf("  level_matches = %u, level_count = %u\n",
 	       chain.level_matches, chain.level_count);
 }
 
diff --git a/util/copyrights b/util/copyrights
index 6f24e79209..3b1869f892 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -588,7 +588,7 @@
 ./bin/tests/rbt/win32/t_rbt.vcxproj.filters.in	X	2013,2015
 ./bin/tests/rbt/win32/t_rbt.vcxproj.in		X	2013,2015,2016,2017
 ./bin/tests/rbt/win32/t_rbt.vcxproj.user	X	2013
-./bin/tests/rbt_test.c				C	1999,2000,2001,2004,2005,2007,2009,2011,2012,2014,2015,2016
+./bin/tests/rbt_test.c C 1999,2000,2001,2004,2005,2007,2009,2011,2012,2014,2015,2016,2018
 ./bin/tests/rbt_test.out			X	1999,2000,2001
 ./bin/tests/rbt_test.txt			SH	1999,2000,2001,2004,2007,2012,2016
 ./bin/tests/resolv.conf.sample			CONF-SH	2000,2001,2004,2007,2012,2016