diff --git a/ceph-osd/templates/daemonset-osd.yaml b/ceph-osd/templates/daemonset-osd.yaml
index 2c98ce9154..88887b50c4 100644
--- a/ceph-osd/templates/daemonset-osd.yaml
+++ b/ceph-osd/templates/daemonset-osd.yaml
@@ -200,7 +200,7 @@ spec:
               readOnly: false
             - name: pod-var-lib-ceph-tmp
               mountPath: /var/lib/ceph/tmp
-              ReadOnly: false
+              readOnly: false
             - name: run-lvm
               mountPath: /run/lvm
               readOnly: false