diff --git a/examples/rbd/storageclass.yaml b/examples/rbd/storageclass.yaml
index 6e6c7e1be..c87f45348 100644
--- a/examples/rbd/storageclass.yaml
+++ b/examples/rbd/storageclass.yaml
@@ -34,3 +34,5 @@ parameters:
    # uncomment the following to use rbd-nbd as mounter on supported nodes
    # mounter: rbd-nbd
 reclaimPolicy: Delete
+mountOptions:
+   - discard
diff --git a/pkg/rbd/nodeserver.go b/pkg/rbd/nodeserver.go
index 08a18d465..9099cd588 100644
--- a/pkg/rbd/nodeserver.go
+++ b/pkg/rbd/nodeserver.go
@@ -144,17 +144,15 @@ func (ns *NodeServer) mountVolume(req *csi.NodePublishVolumeRequest, devicePath
 
 	diskMounter := &mount.SafeFormatAndMount{Interface: ns.mounter, Exec: mount.NewOsExec()}
 	if isBlock {
-		options := []string{"bind"}
-		if err := diskMounter.Mount(devicePath, targetPath, fsType, options); err != nil {
+		mountFlags = append(mountFlags, "bind")
+		if err := diskMounter.Mount(devicePath, targetPath, fsType, mountFlags); err != nil {
 			return err
 		}
 	} else {
-		options := []string{}
 		if readOnly {
-			options = append(options, "ro")
+			mountFlags = append(mountFlags, "ro")
 		}
-
-		if err := diskMounter.FormatAndMount(devicePath, targetPath, fsType, options); err != nil {
+		if err := diskMounter.FormatAndMount(devicePath, targetPath, fsType, mountFlags); err != nil {
 			return err
 		}
 	}