diff --git a/cinder/api/openstack/rest_api_version_history.rst b/cinder/api/openstack/rest_api_version_history.rst
index ec395728914..d2dfecbbfe3 100644
--- a/cinder/api/openstack/rest_api_version_history.rst
+++ b/cinder/api/openstack/rest_api_version_history.rst
@@ -394,3 +394,7 @@ Add ``shared_targets`` and ``service_uuid`` fields to volume.
 3.49
 ----
   Support report backend storage state in service list.
+
+3.50
+----
+  Add multiattach capability.