diff --git a/deploy/charts/emqx/values.yaml b/deploy/charts/emqx/values.yaml
index 0423c8cdf..c737c8808 100644
--- a/deploy/charts/emqx/values.yaml
+++ b/deploy/charts/emqx/values.yaml
@@ -35,6 +35,8 @@ serviceAccount:
 ## Forces the recreation of pods during helm upgrades. This can be useful to update configuration values even if the container image did not change.
 recreatePods: false
 
+clusterDomain: cluster.local
+
 podAnnotations: {}
 
 # Pod deployment policy