diff --git a/axum-core/src/lib.rs b/axum-core/src/lib.rs
index 94077c1f..5d4b27a4 100644
--- a/axum-core/src/lib.rs
+++ b/axum-core/src/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(nightly_error_messages, feature(rustc_attrs))]
+#![cfg_attr(nightly_error_messages, allow(internal_features), feature(rustc_attrs))]
 //! Core types and traits for [`axum`].
 //!
 //! Libraries authors that want to provide [`FromRequest`] or [`IntoResponse`] implementations
diff --git a/axum/src/lib.rs b/axum/src/lib.rs
index d3e38c36..b567b97e 100644
--- a/axum/src/lib.rs
+++ b/axum/src/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(nightly_error_messages, feature(rustc_attrs))]
+#![cfg_attr(nightly_error_messages, allow(internal_features), feature(rustc_attrs))]
 //! axum is a web application framework that focuses on ergonomics and modularity.
 //!
 //! # Table of contents