diff --git a/support/atom2/src/lib.rs b/support/atom2/src/lib.rs
index e61423c4..2ae07bb6 100644
--- a/support/atom2/src/lib.rs
+++ b/support/atom2/src/lib.rs
@@ -1,7 +1,6 @@
 //! Reimplementation of the [atom] library with specialized and extended features.
 //!
 //! [atom]: https://crates.io/crates/atom
-#![feature(box_into_raw_non_null)]
 #![feature(const_fn)] // `const fn` with a constrained type parameter (e.g., `T: PtrSized`)
 use std::cell::Cell;
 use std::marker::PhantomData;
@@ -85,7 +84,7 @@ impl<T: PtrSized> PtrSizedExt for T {
 
 unsafe impl<T> PtrSized for Box<T> {
     fn into_raw(this: Self) -> NonNull<()> {
-        unsafe { mem::transmute(Box::into_raw_non_null(this)) }
+        NonNull::from(Box::leak(this)).cast()
     }
     unsafe fn from_raw(ptr: NonNull<()>) -> Self {
         Box::from_raw(ptr.as_ptr() as _)
diff --git a/support/neo_linked_list/src/lib.rs b/support/neo_linked_list/src/lib.rs
index 5bde8997..4c6bdcdf 100644
--- a/support/neo_linked_list/src/lib.rs
+++ b/support/neo_linked_list/src/lib.rs
@@ -1,5 +1,4 @@
 //! Provides a customized version of `std::collections::LinkedList`.
-#![feature(box_into_raw_non_null)]
 pub mod cell;
 pub mod linked_list;
 
diff --git a/support/neo_linked_list/src/linked_list.rs b/support/neo_linked_list/src/linked_list.rs
index 7e101c81..ffe527c4 100644
--- a/support/neo_linked_list/src/linked_list.rs
+++ b/support/neo_linked_list/src/linked_list.rs
@@ -177,9 +177,7 @@ impl<T: ?Sized> Node<T> {
     fn box_into_hdr(mut self: Box<Self>) -> NonNull<Hdr> {
         self.set_vtable();
 
-        let mut raw = Box::into_raw_non_null(self);
-
-        NonNull::from(unsafe { &mut raw.as_mut().hdr })
+        NonNull::from(&mut Box::leak(self).hdr)
     }
 
     #[inline]