diff --git a/helm/higress/README.md b/helm/higress/README.md
index 3452f1282..7c1c32182 100644
--- a/helm/higress/README.md
+++ b/helm/higress/README.md
@@ -163,6 +163,7 @@ The command removes all the Kubernetes components associated with the chart and
 | global.defaultResources | object | `{"requests":{"cpu":"10m"}}` | A minimal set of requested resources to applied to all deployments so that Horizontal Pod Autoscaler will be able to function (if set). Each component can overwrite these default values by adding its own resources block in the relevant section below and setting the desired resources values. |
 | global.defaultUpstreamConcurrencyThreshold | int | `10000` |  |
 | global.disableAlpnH2 | bool | `false` | Whether to disable HTTP/2 in ALPN |
+| global.enableDeltaXDS | bool | `false` | Whether to enable Istio delta xDS. Default is false due to SRDS compatibility. |
 | global.enableGatewayAPI | bool | `true` | If true, Higress Controller will monitor Gateway API resources as well |
 | global.enableH3 | bool | `false` |  |
 | global.enableIPv6 | bool | `false` |  |