diff --git a/tokio/src/task/join_set.rs b/tokio/src/task/join_set.rs
index 8e8f74f66..a2f848391 100644
--- a/tokio/src/task/join_set.rs
+++ b/tokio/src/task/join_set.rs
@@ -48,6 +48,7 @@ use crate::util::IdleNotifiedSet;
 /// ```
 ///
 /// [unstable]: crate#unstable-features
+#[cfg_attr(docsrs, doc(cfg(all(feature = "rt", tokio_unstable))))]
 pub struct JoinSet<T> {
     inner: IdleNotifiedSet<JoinHandle<T>>,
 }