diff --git a/cinder/values.yaml b/cinder/values.yaml
index 019938aae0..19289ef589 100644
--- a/cinder/values.yaml
+++ b/cinder/values.yaml
@@ -835,6 +835,7 @@ conf:
       rbd_pool: cinder.volumes
       rbd_ceph_conf: "/etc/ceph/ceph.conf"
       rbd_flatten_volume_from_snapshot: false
+      report_discard_supported: true
       rbd_max_clone_depth: 5
       rbd_store_chunk_size: 4
       rados_connect_timeout: -1