diff --git a/Cargo.toml b/Cargo.toml
index cf28d62..fd46845 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,3 +17,4 @@ serde_json = "1.0"
 [features]
 default = []
 serde = ["dep:serde"]
+coerce_unsized = []
diff --git a/src/lib.rs b/src/lib.rs
index 1f50069..90c680e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -44,11 +44,15 @@
 #![allow(unsafe_code)]
 #![deny(missing_docs)]
 
+#![cfg_attr(feature = "coerce_unsized", feature(coerce_unsized))]
+
 use core::cell::UnsafeCell;
 use core::cmp;
 use core::fmt;
 use core::fmt::{Debug, Display};
 use core::marker::PhantomData;
+#[cfg(feature = "coerce_unsized")]
+use core::ops::CoerceUnsized;
 use core::ops::{Deref, DerefMut};
 use core::ptr::NonNull;
 use core::sync::atomic;
@@ -65,6 +69,9 @@ pub struct AtomicRefCell<T: ?Sized> {
     value: UnsafeCell<T>,
 }
 
+#[cfg(feature = "coerce_unsized")]
+impl<T: CoerceUnsized<U>, U> CoerceUnsized<AtomicRefCell<U>> for AtomicRefCell<T> {}
+
 /// An error returned by [`AtomicRefCell::try_borrow`](struct.AtomicRefCell.html#method.try_borrow).
 pub struct BorrowError {
     _private: (),