diff --git a/util/copyrights b/util/copyrights
index e46adde2cf..38b5162af8 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -2364,7 +2364,7 @@
 ./lib/isc/win32/include/isc/stdtime.h		C	1999,2000,2001,2004,2005,2007
 ./lib/isc/win32/include/isc/strerror.h		C	2001,2004,2007
 ./lib/isc/win32/include/isc/syslog.h		C	1999,2000,2001,2004,2007
-./lib/isc/win32/include/isc/thread.h		C	1998,1999,2000,2001,2004,2005,2007
+./lib/isc/win32/include/isc/thread.h		C	1998,1999,2000,2001,2004,2005,2007,2009
 ./lib/isc/win32/include/isc/time.h		C	1998,1999,2000,2001,2004,2006,2007,2008,2009
 ./lib/isc/win32/include/isc/win32os.h		C	2002,2004,2007,2009
 ./lib/isc/win32/interfaceiter.c			C	1999,2000,2001,2004,2007,2008,2009