diff --git a/cluster/ubuntu/config-default.sh b/cluster/ubuntu/config-default.sh
index 83b487e7b79..aef361bf86b 100755
--- a/cluster/ubuntu/config-default.sh
+++ b/cluster/ubuntu/config-default.sh
@@ -116,7 +116,6 @@ ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 # DNS_SERVER_IP must be a IP in SERVICE_CLUSTER_IP_RANGE
 DNS_SERVER_IP=${DNS_SERVER_IP:-"192.168.3.10"}
 DNS_DOMAIN=${DNS_DOMAIN:-"cluster.local"}
-DNS_REPLICAS=${DNS_REPLICAS:-1}
 
 # Optional: Enable DNS horizontal autoscaler
 ENABLE_DNS_HORIZONTAL_AUTOSCALER="${KUBE_ENABLE_DNS_HORIZONTAL_AUTOSCALER:-false}"