diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 653b4573e2a..602f3b803f5 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -636,6 +636,7 @@ impl<T: ?Sized> Rc<T> {
     ///
     /// ```
     /// #![feature(rc_into_raw_non_null)]
+    /// #![allow(deprecated)]
     ///
     /// use std::rc::Rc;
     ///
@@ -645,6 +646,7 @@ impl<T: ?Sized> Rc<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")]
     #[inline]
     pub fn into_raw_non_null(this: Self) -> NonNull<T> {
         // safe because Rc guarantees its pointer is non-null
diff --git a/src/liballoc/sync.rs b/src/liballoc/sync.rs
index 59bc8686cf4..34372b18254 100644
--- a/src/liballoc/sync.rs
+++ b/src/liballoc/sync.rs
@@ -635,6 +635,7 @@ impl<T: ?Sized> Arc<T> {
     ///
     /// ```
     /// #![feature(rc_into_raw_non_null)]
+    /// #![allow(deprecated)]
     ///
     /// use std::sync::Arc;
     ///
@@ -644,6 +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")]
     #[inline]
     pub fn into_raw_non_null(this: Self) -> NonNull<T> {
         // safe because Arc guarantees its pointer is non-null