diff --git a/README.md b/README.md
index b59c8ff..552f0a1 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ This crate provides the following primitives:
 
 * `Barrier` - enables tasks to synchronize all together at the same time.
 * `Mutex` - a mutual exclusion lock.
+* `OnceCell` - a memory location that can be written to at most once.
 * `RwLock` - a reader-writer lock, allowing any number of readers or a single writer.
 * `Semaphore` - limits the number of concurrent operations.
 
diff --git a/src/lib.rs b/src/lib.rs
index fe81907..2bb8fe0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,6 +4,7 @@
 //!
 //! * [`Barrier`] - enables tasks to synchronize all together at the same time.
 //! * [`Mutex`] - a mutual exclusion lock.
+//! * [`OnceCell`] - a memory location that can be written to at most once.
 //! * [`RwLock`] - a reader-writer lock, allowing any number of readers or a single writer.
 //! * [`Semaphore`] - limits the number of concurrent operations.
 //!