diff --git a/cinder/api/openstack/rest_api_version_history.rst b/cinder/api/openstack/rest_api_version_history.rst
index c4d1c4130ed..cdec962221f 100644
--- a/cinder/api/openstack/rest_api_version_history.rst
+++ b/cinder/api/openstack/rest_api_version_history.rst
@@ -486,7 +486,7 @@ Includes volume type ID in the volume-show and volume-detail-list JSON
 responses. Before this microversion, Cinder returns only the volume type name
 in the volume details.
 
-3.64
-----
+3.64 (Maximum in Wallaby)
+-------------------------
 Include the ``encryption_key_id`` in volume and backup details when the
 associated volume is encrypted.