diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 567fd625582..1195805e6ea 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -481,7 +481,7 @@ impl<T: ?Sized> Box<T> {
     #[unstable(
         feature = "ptr_internals",
         issue = "none",
-        reason = "use `Box::leak(b).into()` or `NonNull::from(Box::leak(b))` instead"
+        reason = "use `Box::leak(b).into()` or `Unique::from(Box::leak(b))` instead"
     )]
     #[inline]
     #[doc(hidden)]
diff --git a/src/liballoc/sync.rs b/src/liballoc/sync.rs
index 34372b18254..c05af4c7e51 100644
--- a/src/liballoc/sync.rs
+++ b/src/liballoc/sync.rs
@@ -645,7 +645,7 @@ impl<T: ?Sized> Arc<T> {
     /// assert_eq!(deref, "hello");
     /// ```
     #[unstable(feature = "rc_into_raw_non_null", issue = "47336")]
-    #[rustc_deprecated(since = "1.44.0", reason = "use `Rc::into_raw` instead")]
+    #[rustc_deprecated(since = "1.44.0", reason = "use `Arc::into_raw` instead")]
     #[inline]
     pub fn into_raw_non_null(this: Self) -> NonNull<T> {
         // safe because Arc guarantees its pointer is non-null