diff --git a/changelog.d/14845.doc b/changelog.d/14845.doc
new file mode 100644
index 0000000000..dd969aa05c
--- /dev/null
+++ b/changelog.d/14845.doc
@@ -0,0 +1 @@
+Fix the example config missing the `id` field in [application service documentation](https://matrix-org.github.io/synapse/latest/application_services.html).
diff --git a/docs/application_services.md b/docs/application_services.md
index e4592010a2..1f988185a9 100644
--- a/docs/application_services.md
+++ b/docs/application_services.md
@@ -15,6 +15,7 @@ app_service_config_files:
 The format of the AS configuration file is as follows:
 
 ```yaml
+id: <your-AS-id>
 url: <base url of AS>
 as_token: <token AS will add to requests to HS>
 hs_token: <token HS will add to requests to AS>