diff --git a/tokio/src/sync.rs b/tokio/src/sync.rs
index ab708fb51..c8fb75241 100644
--- a/tokio/src/sync.rs
+++ b/tokio/src/sync.rs
@@ -13,4 +13,4 @@
 //! - [watch](watch/index.html), a single-producer, multi-consumer channel that
 //!   only stores the **most recently** sent value.
 
-pub use tokio_sync::{/*lock, mpsc,*/ oneshot, watch};
+pub use tokio_sync::{lock, mpsc, oneshot, watch};