diff --git a/openstack/block_storage/v3/volume.py b/openstack/block_storage/v3/volume.py
index 7f5a0ef2d..04a0b0cec 100644
--- a/openstack/block_storage/v3/volume.py
+++ b/openstack/block_storage/v3/volume.py
@@ -49,6 +49,9 @@ class Volume(resource.Resource, metadata.MetadataMixin):
     attachments = resource.Body("attachments", type=list)
     #: The availability zone.
     availability_zone = resource.Body("availability_zone")
+    #: To create a volume from an existing backup, specify the ID of
+    #: the existing volume backup. (since 3.47)
+    backup_id = resource.Body("backup_id")
     #: ID of the consistency group.
     consistency_group_id = resource.Body("consistencygroup_id")
     #: Whether this resource consumes quota or not. Resources that not counted