diff --git a/library/core/src/cell.rs b/library/core/src/cell.rs
index 129213fde7491..d571f1d51add5 100644
--- a/library/core/src/cell.rs
+++ b/library/core/src/cell.rs
@@ -209,6 +209,10 @@ pub use once::OnceCell;
 
 /// A mutable memory location.
 ///
+/// # Memory layout
+///
+/// `Cell<T>` shares the same memory layout and caveats as `UnsafeCell<T>`.
+///
 /// # Examples
 ///
 /// In this example, you can see that `Cell<T>` enables mutation inside an