diff --git a/ceph-mon/values.yaml b/ceph-mon/values.yaml
index af66e7072..4fc04ce30 100644
--- a/ceph-mon/values.yaml
+++ b/ceph-mon/values.yaml
@@ -175,6 +175,7 @@ conf:
       objecter_inflight_ops: 10240
       debug_ms: "0/0"
       mon_osd_down_out_interval: 1800
+      mon_data_avail_warn: 15
     osd:
       osd_mkfs_type: xfs
       osd_mkfs_options_xfs: -f -i size=2048