diff --git a/controllers/nginx/README.md b/controllers/nginx/README.md
index fbdd9ae651..2a4bb2c680 100644
--- a/controllers/nginx/README.md
+++ b/controllers/nginx/README.md
@@ -314,8 +314,8 @@ version to fully support Kube-Lego is nginx Ingress controller 0.8.
 
 ## Exposing TCP services
 
-Ingress does not support TCP services (yet). For this reason this Ingress controller uses the flag `--tcp-services-configmap` to point to an existing config map where the key is the external port to use and the value is `<namespace/service name>:<service port>`
-It is possible to use a number or the name of the port.
+Ingress does not support TCP services (yet). For this reason this Ingress controller uses the flag `--tcp-services-configmap` to point to an existing config map where the key is the external port to use and the value is `<namespace/service name>:<service port>:[PROXY]`
+It is possible to use a number or the name of the port. The last field is optional. Adding `PROXY` in the last field we can enable Proxy Protocol in a TCP service.
 
 The next example shows how to expose the service `example-go` running in the namespace `default` in the port `8080` using the port `9000`
 ```