diff --git a/util/copyrights b/util/copyrights
index 0c04743ef9..57f50cd943 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -3262,6 +3262,7 @@
 ./doc/arm/notes-9.11.25.xml			SGML	2020,2021
 ./doc/arm/notes-9.11.26.xml			SGML	2020,2021
 ./doc/arm/notes-9.11.27.xml			SGML	2020,2021
+./doc/arm/notes-9.11.28.xml			SGML	2021
 ./doc/arm/notes-9.11.3.xml			SGML	2019,2020,2021
 ./doc/arm/notes-9.11.4.xml			SGML	2019,2020,2021
 ./doc/arm/notes-9.11.5.xml			SGML	2019,2020,2021