diff --git a/docs/authorization_for_user.md b/docs/authorization_for_user.md
index e4c41c9c..42532461 100644
--- a/docs/authorization_for_user.md
+++ b/docs/authorization_for_user.md
@@ -96,6 +96,7 @@ Location: {redirect_uri}?code={authorization_code}
 
 * `grant_type=authorization_code`
 * `client_id` и `client_secret` - необходимо заполнить значениями, выданными при [регистрации приложения](https://dev.hh.ru/admin)
+* `redirect_uri` - если параметр был уточнен на шаге [получения авторизации](#get-auth), необходимо передать уточненный `redirect_uri` или вернется ошибка, если уточнения не было, параметр можно не посылать.
 * `code` – значение `authorization_code`, полученное при
   [перенаправлении пользователя](#get-authorization_code)
 
diff --git a/docs_eng/authorization_for_user.md b/docs_eng/authorization_for_user.md
index 58e4dcc9..a201a786 100644
--- a/docs_eng/authorization_for_user.md
+++ b/docs_eng/authorization_for_user.md
@@ -95,6 +95,12 @@ The request body should contain the following information:
 * `client_secret={client_secret}`
 * `code={authorization_code}`
 
+If, when obtaining the `authorization_code`, `redirect_uri` was indicated, then
+this value must be sent in the request (strings are compared); otherwise this
+parameter is optional. If `redirect_uri` is not indicated when requesting
+`/oauth/authorize`, then, when indicating it in the second request
+(`/oauth/token`), the server will return an error.
+
 Request body must be sent in standard `application/x-www-form-urlencoded`
 with the indication of a corresponding title `Content-Type`.