diff --git a/util/copyrights b/util/copyrights
index b1128e6eb2..4c78cc812f 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -61,7 +61,7 @@
 ./bin/dnssec/dnssec-keygen.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
-./bin/dnssec/dnssec-signzone.docbook		SGML	2000,2001,2002,2003,2004,2005
+./bin/dnssec/dnssec-signzone.docbook		SGML	2000,2001,2002,2003,2004,2005,2006
 ./bin/dnssec/dnssec-signzone.html		HTML	DOCBOOK
 ./bin/dnssec/dnssectool.c			C	2000,2001,2003,2004,2005
 ./bin/dnssec/dnssectool.h			C	2000,2001,2003,2004