diff --git a/src/middleware/normalize.rs b/src/middleware/normalize.rs
index 327c81cbf..b7a08f5db 100644
--- a/src/middleware/normalize.rs
+++ b/src/middleware/normalize.rs
@@ -16,6 +16,7 @@ use crate::Error;
 /// Performs following:
 ///
 /// - Merges multiple slashes into one.
+/// - Appends a trailing slash if one is not present.
 ///
 /// ```rust
 /// use actix_web::{web, http, middleware, App, HttpResponse};