diff --git a/cluster/charts/rook-ceph-cluster/templates/cephfilesystem.yaml b/cluster/charts/rook-ceph-cluster/templates/cephfilesystem.yaml
index 73be71f60cb7..c2eeb5032b8d 100644
--- a/cluster/charts/rook-ceph-cluster/templates/cephfilesystem.yaml
+++ b/cluster/charts/rook-ceph-cluster/templates/cephfilesystem.yaml
@@ -13,6 +13,8 @@ apiVersion: storage.k8s.io/v1
 kind: StorageClass
 metadata:
   name: {{ $filesystem.storageClass.name }}
+  annotations:
+    storageclass.kubernetes.io/is-default-class: "{{ if default false $filesystem.storageClass.isDefault }}true{{ else }}false{{ end }}"
 provisioner: {{ $root.Values.operatorNamespace }}.cephfs.csi.ceph.com
 parameters:
   fsName: {{ $filesystem.name }}
diff --git a/cluster/charts/rook-ceph-cluster/values.yaml b/cluster/charts/rook-ceph-cluster/values.yaml
index 18d621eadbaa..61f9ba206df6 100644
--- a/cluster/charts/rook-ceph-cluster/values.yaml
+++ b/cluster/charts/rook-ceph-cluster/values.yaml
@@ -369,6 +369,7 @@ cephFileSystems:
         activeStandby: true
     storageClass:
       enabled: true
+      isDefault: false
       name: ceph-filesystem
       reclaimPolicy: Delete
       # see https://github.com/rook/rook/blob/master/Documentation/ceph-filesystem.md#provision-storage for available configuration