diff --git a/actix-http/src/body/mod.rs b/actix-http/src/body/mod.rs
index 439a4355e..724e20597 100644
--- a/actix-http/src/body/mod.rs
+++ b/actix-http/src/body/mod.rs
@@ -86,6 +86,7 @@ mod tests {
         }
     }
 
+    /// AnyBody alias because rustc does not (can not?) infer the default type parameter.
     type TestBody = AnyBody;
 
     #[actix_rt::test]