diff --git a/docs/12 - OpenAI API.md b/docs/12 - OpenAI API.md
index d36bb77c..09afc2a9 100644
--- a/docs/12 - OpenAI API.md	
+++ b/docs/12 - OpenAI API.md	
@@ -14,7 +14,7 @@ Add `--extensions openai` to your command-line flags.
 
 * To create a public Cloudflare URL, also add the `--public-api` flag.
 * To listen on your local network, also add the `--listen` flag.
-* To change the port, which is 5000 by default, use `--port 1234` (change 1234 to your desired port number).
+* To change the port, which is 5000 by default, use `--api-port 1234` (change 1234 to your desired port number).
 * To use SSL, add `--ssl-keyfile key.pem --ssl-certfile cert.pem`. Note that it doesn't work with `--public-api`.
 
 #### Environment variables