diff --git a/api/deploy/kubernetes/csi-config-map.go b/api/deploy/kubernetes/csi-config-map.go
index 4d237b3c5..0c418e23d 100644
--- a/api/deploy/kubernetes/csi-config-map.go
+++ b/api/deploy/kubernetes/csi-config-map.go
@@ -46,6 +46,8 @@ type RBD struct {
 	NetNamespaceFilePath string `json:"netNamespaceFilePath"`
 	// RadosNamespace is a rados namespace in the pool
 	RadosNamespace string `json:"radosNamespace"`
+	// RBD mirror daemons running in the ceph cluster.
+	MirrorDaemonCount int `json:"mirrorDaemonCount"`
 }
 
 type NFS struct {