diff --git a/charts/ingress-nginx/README.md b/charts/ingress-nginx/README.md
index 955091873..4baf63b90 100644
--- a/charts/ingress-nginx/README.md
+++ b/charts/ingress-nginx/README.md
@@ -401,6 +401,7 @@ As of version `1.26.0` of this chart, by simply not providing any clusterIP valu
 | controller.scope.namespaceSelector | string | `""` | When scope.enabled == false, instead of watching all namespaces, we watching namespaces whose labels only match with namespaceSelector. Format like foo=bar. Defaults to empty, means watching all namespaces. |
 | controller.service.annotations | object | `{}` |  |
 | controller.service.appProtocol | bool | `true` | If enabled is adding an appProtocol option for Kubernetes service. An appProtocol field replacing annotations that were using for setting a backend protocol. Here is an example for AWS: service.beta.kubernetes.io/aws-load-balancer-backend-protocol: http It allows choosing the protocol for each backend specified in the Kubernetes service. See the following GitHub issue for more details about the purpose: https://github.com/kubernetes/kubernetes/issues/40244 Will be ignored for Kubernetes versions older than 1.20 # |
+| controller.service.appProtocolInUpperCase | bool | `false` | If enabled,  appProtocol values will be in uppercase. (This is needed for example with [GKE GatewayAPI](https://cloud.google.com/kubernetes-engine/docs/how-to/secure-gateway#restrictions_and_limitations)) |
 | controller.service.enableHttp | bool | `true` |  |
 | controller.service.enableHttps | bool | `true` |  |
 | controller.service.enabled | bool | `true` |  |
diff --git a/charts/ingress-nginx/values.yaml b/charts/ingress-nginx/values.yaml
index ea64cdeef..22d69203a 100644
--- a/charts/ingress-nginx/values.yaml
+++ b/charts/ingress-nginx/values.yaml
@@ -415,7 +415,7 @@ controller:
     # Will be ignored for Kubernetes versions older than 1.20
     ##
     appProtocol: true
-    # -- For GatewayAPI in GKE uppercase values are expected, otherwise LB healthchecks will be allways http.
+    # -- If enabled,  appProtocol values will be in uppercase. (This is needed for example with GKE GatewayAPI - https://cloud.google.com/kubernetes-engine/docs/how-to/secure-gateway#restrictions_and_limitations)
     appProtocolInUpperCase: false
     annotations: {}
     labels: {}