diff --git a/apis/objectstore/v100/master_types.go b/apis/objectstore/v100/master_types.go
index f2c6bb5..677e08d 100644
--- a/apis/objectstore/v100/master_types.go
+++ b/apis/objectstore/v100/master_types.go
@@ -28,8 +28,8 @@ type MasterSpec struct {
 	// INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
 	// Important: Run "make" to regenerate code after modifying this file
 
-	// Mdir is data directory to store meta data
-	Mdir           string `json:"mdir,omitempty"`
+	// Mdir is the directory to store meta data
+	Mdir string `json:"mdir,omitempty"`
 	// MetricsAddress is Prometheus gateway address
 	MetricsAddress string `json:"metricsAddress,omitempty"`
 }
diff --git a/config/crd/bases/objectstore.seaweedfs.com_masters.yaml b/config/crd/bases/objectstore.seaweedfs.com_masters.yaml
index 6652fdc..be791da 100644
--- a/config/crd/bases/objectstore.seaweedfs.com_masters.yaml
+++ b/config/crd/bases/objectstore.seaweedfs.com_masters.yaml
@@ -37,7 +37,7 @@ spec:
           description: MasterSpec defines the desired state of Master
           properties:
             mdir:
-              description: Mdir is data directory to store meta data
+              description: Mdir is the directory to store meta data
               type: string
             metricsAddress:
               description: MetricsAddress is Prometheus gateway address