diff --git a/cmd/climc/shell/compute/serverdisks.go b/cmd/climc/shell/compute/serverdisks.go
index 0b1a1819d5..2c35542181 100644
--- a/cmd/climc/shell/compute/serverdisks.go
+++ b/cmd/climc/shell/compute/serverdisks.go
@@ -78,7 +78,7 @@ func init() {
 		SERVER string `help:"ID or Name of server"`
 		DISK   string `help:"ID or Name of Disk"`
 		Driver string `help:"Driver of vDisk" choices:"virtio|ide|scsi|pvscsi"`
-		Cache  string `help:"Cache mode of vDisk" choices:"writethrough|none|writeback"`
+		Cache  string `help:"Cache mode of vDisk" choices:"writethrough|none|writeback|directsync"`
 		Aio    string `help:"Asynchronous IO mode of vDisk" choices:"native|threads"`
 		Index  int64  `help:"Index of vDisk" default:"-1"`
 	}