diff --git a/util/copyrights b/util/copyrights
index 69b1bcbfd5..7f4cc8c19e 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -1180,6 +1180,7 @@
 ./lib/isc/include/isc/quota.h			C	2000,2001
 ./lib/isc/include/isc/random.h			C	1999,2000,2001
 ./lib/isc/include/isc/ratelimiter.h		C	1999,2000,2001
+./lib/isc/include/isc/refcount.h		C	2001
 ./lib/isc/include/isc/region.h			C	1998,1999,2000,2001
 ./lib/isc/include/isc/resource.h		C	2000,2001
 ./lib/isc/include/isc/result.h			C	1998,1999,2000,2001