diff --git a/actix-http/src/lib.rs b/actix-http/src/lib.rs
index f5432996f..7dcb4df4a 100644
--- a/actix-http/src/lib.rs
+++ b/actix-http/src/lib.rs
@@ -81,7 +81,7 @@ pub enum Protocol {
 
 type ConnectCallback<IO> = dyn Fn(&IO, &mut Extensions);
 
-// container for data that extract with ConnectCallback
+/// Container for data that extract with ConnectCallback.
 pub(crate) struct OnConnectData(Option<Extensions>);
 
 impl Default for OnConnectData {