diff --git a/doc/notes/notes-9.21.1.rst b/doc/notes/notes-9.21.1.rst
index 68cc258c8e..46c4ef8e10 100644
--- a/doc/notes/notes-9.21.1.rst
+++ b/doc/notes/notes-9.21.1.rst
@@ -83,6 +83,12 @@ Feature Changes
   quotas. This should help in maintaining the cache from which query
   responses can be given. :gl:`#4219`
 
+- Improve performance for queries that require an NSEC3 wildcard proof.
+
+  Rather than starting from the longest matching part of the requested name,
+  lookup the shortest partial match. Most of the time this will be the actual
+  closest encloser. :gl:`#4460`
+
 - Follow the number of CPUs set by ``taskset``/``cpuset``.
 
   Administrators may wish to constrain the set of cores that