diff --git a/src/routes/solid-start/v1/reference/config/define-config.mdx b/src/routes/solid-start/v1/reference/config/define-config.mdx
index ff80439e46..16191d94de 100644
--- a/src/routes/solid-start/v1/reference/config/define-config.mdx
+++ b/src/routes/solid-start/v1/reference/config/define-config.mdx
@@ -20,6 +20,14 @@ The `defineConfig` helper is from `@solidjs/start/config` and is used within [`a
 
 It takes a configuration object with settings for SolidStart, Vite, and Nitro.
 
+To change the local development port, pass `--port` to Vinxi's dev command. For example, to run on port 3001:
+
+```sh
+vinxi dev --port 3001
+```
+
+If your `package.json` has a `dev` script, you can add `--port 3001` to that script instead. The port is set on the dev command, not through `defineConfig`. See the [Vinxi CLI docs](https://vinxi.vercel.app/api/cli.html) for other options.
+
 ## Configuring Vite
 
 SolidStart supports most Vite options, including plugins via the `vite` option: