diff --git a/util/copyrights b/util/copyrights
index af7f3fcebe..e7a1bc576f 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -156,7 +156,7 @@
 ./bin/dnssec/dnssec-settime.html		HTML	DOCBOOK
 ./bin/dnssec/dnssec-signzone.8			MAN	DOCBOOK
 ./bin/dnssec/dnssec-signzone.c			C.NAI	1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016
-./bin/dnssec/dnssec-signzone.docbook		SGML	2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2011,2012,2013,2014,2015,2016
+./bin/dnssec/dnssec-signzone.docbook		SGML	2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2011,2012,2013,2014,2015,2016,2017
 ./bin/dnssec/dnssec-signzone.html		HTML	DOCBOOK
 ./bin/dnssec/dnssec-verify.8			MAN	DOCBOOK
 ./bin/dnssec/dnssec-verify.c			C	2012,2014,2015,2016