diff --git a/util/copyrights b/util/copyrights
index 7febbe19a8..5888d3c28d 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -225,7 +225,7 @@
 ./bin/nsupdate/Makefile.in			MAKE	2000,2001,2002,2004,2006,2007,2008,2009
 ./bin/nsupdate/nsupdate.1			MAN	DOCBOOK
 ./bin/nsupdate/nsupdate.c			C	2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011
-./bin/nsupdate/nsupdate.docbook			SGML	2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010
+./bin/nsupdate/nsupdate.docbook			SGML	2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011
 ./bin/nsupdate/nsupdate.html			HTML	DOCBOOK
 ./bin/nsupdate/win32/nsupdate.dsp		X	2001,2004,2005,2009
 ./bin/nsupdate/win32/nsupdate.dsw		X	2001