diff --git a/docs/Guides/Ecosystem.md b/docs/Guides/Ecosystem.md
index f80dcc8282..f769926dc3 100644
--- a/docs/Guides/Ecosystem.md
+++ b/docs/Guides/Ecosystem.md
@@ -565,6 +565,8 @@ section.
   for [zod](https://github.com/colinhacks/zod).
 - [`fastify-typeorm-plugin`](https://github.com/inthepocket/fastify-typeorm-plugin)
   Fastify plugin to work with TypeORM.
+- [`fastify-user-agent`](https://github.com/Eomm/fastify-user-agent) parses your
+  request's `user-agent` header.
 - [`fastify-vhost`](https://github.com/patrickpissurno/fastify-vhost) Proxy
   subdomain HTTP requests to another server (useful if you want to point
   multiple subdomains to the same IP address, while running different servers on