diff --git a/charts/tidb-cluster/values.yaml b/charts/tidb-cluster/values.yaml
index 46d931a512..3762b5e37c 100644
--- a/charts/tidb-cluster/values.yaml
+++ b/charts/tidb-cluster/values.yaml
@@ -10,7 +10,7 @@ rbac:
 # clusterName is the TiDB cluster name, if not specified, the chart release name will be used
 # clusterName: demo
 
-# Add additional TidbCluster labels
+# Add extra labels to TidbCluster object
 # ref: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
 extraLabels: {}