diff --git a/library/alloc/src/boxed.rs b/library/alloc/src/boxed.rs
index 97186589a4f4c..e5f6b0c0c65d2 100644
--- a/library/alloc/src/boxed.rs
+++ b/library/alloc/src/boxed.rs
@@ -187,7 +187,7 @@ pub use thin::ThinBox;
 
 mod thin;
 
-/// A pointer type for heap allocation.
+/// A pointer type that uniquely owns a heap allocation of type `T`.
 ///
 /// See the [module-level documentation](../../std/boxed/index.html) for more.
 #[lang = "owned_box"]