diff --git a/changelog.d/11286.doc b/changelog.d/11286.doc
new file mode 100644
index 0000000000..890d7b4ee4
--- /dev/null
+++ b/changelog.d/11286.doc
@@ -0,0 +1 @@
+Fix typo in the word `available` and fix HTTP method (should be `GET`) for the `username_available` admin API. Contributed by Stanislav Motylkov.
diff --git a/docs/admin_api/user_admin_api.md b/docs/admin_api/user_admin_api.md
index f03539c9f0..16ec33b3c1 100644
--- a/docs/admin_api/user_admin_api.md
+++ b/docs/admin_api/user_admin_api.md
@@ -1107,7 +1107,7 @@ This endpoint will work even if registration is disabled on the server, unlike
 The API is:
 
 ```
-POST /_synapse/admin/v1/username_availabile?username=$localpart
+GET /_synapse/admin/v1/username_available?username=$localpart
 ```
 
 The request and response format is the same as the [/_matrix/client/r0/register/available](https://matrix.org/docs/spec/client_server/r0.6.0#get-matrix-client-r0-register-available) API.