diff --git a/util/copyrights b/util/copyrights
index 0c726588a2..2e7b79a6f3 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -2420,6 +2420,7 @@
 ./lib/isc/win32/version.c			C	1998,1999,2000,2001,2004,2007,2016,2018
 ./lib/isc/win32/win32os.c			C	2002,2004,2007,2013,2014,2015,2016,2018
 ./lib/isc/xoshiro128starstar.c			C.PORTION	2018
+./lib/isccc/Kyuafile				X	2018
 ./lib/isccc/alist.c				C.NOM	2001,2004,2005,2007,2015,2016,2018
 ./lib/isccc/api					X	2001,2006,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018
 ./lib/isccc/base64.c				C.NOM	2001,2004,2005,2007,2013,2016,2018