diff --git a/src/lib.rs b/src/lib.rs
index de5ef19..845538b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -16,9 +16,8 @@
 
 #![no_std]
 #![cfg_attr(feature = "bench", feature(test))]
-#![cfg_attr(feature = "nightly", feature(external_doc))]
 #![cfg_attr(feature = "nightly", deny(missing_docs))]
-#![cfg_attr(feature = "nightly", doc(include = "../README.md"))]
+#![cfg_attr(feature = "nightly", doc = include_str!("../README.md"))]
 #![doc(html_logo_url = "https://doc.dalek.rs/assets/dalek-logo-clear.png")]
 #![doc(html_root_url = "https://docs.rs/x25519-dalek/1.1.1")]