diff --git a/src/requests/request.rs b/src/requests/request.rs
index b3f674f3..7e504803 100644
--- a/src/requests/request.rs
+++ b/src/requests/request.rs
@@ -23,7 +23,7 @@ pub trait Request: HasPayload {
      * use it before it's integrated in async/await
      */
 
-    /// A type of an error that may happen while sending a request to Telegram.
+    /// The type of an error that may happen while sending a request to Telegram.
     type Err: std::error::Error + Send;
 
     /// A type of the future returned by the [`send`](Request::send) method.