diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs
index 7187c71799b9..818dad6bce2f 100644
--- a/library/core/src/marker.rs
+++ b/library/core/src/marker.rs
@@ -46,8 +46,8 @@
 /// marker_impls! {
 ///     MarkerTrait for
 ///         u8, i8,
-///         {T: ?Sized} *const T,
-///         {T: ?Sized} *mut T,
+///         {T: PointeeSized} *const T,
+///         {T: PointeeSized} *mut T,
 ///         {T: MarkerTrait} PhantomData<T>,
 ///         u32,
 /// }
@@ -931,15 +931,15 @@ impl<T: PointeeSized> !Freeze for UnsafeCell<T> {}
 pub unsafe auto trait UnsafeUnpin {}
 
 #[unstable(feature = "unsafe_unpin", issue = "125735")]
-impl<T: ?Sized> !UnsafeUnpin for UnsafePinned<T> {}
+impl<T: PointeeSized> !UnsafeUnpin for UnsafePinned<T> {}
 marker_impls! {
 #[unstable(feature = "unsafe_unpin", issue = "125735")]
     unsafe UnsafeUnpin for
-        {T: ?Sized} PhantomData<T>,
-        {T: ?Sized} *const T,
-        {T: ?Sized} *mut T,
-        {T: ?Sized} &T,
-        {T: ?Sized} &mut T,
+        {T: PointeeSized} PhantomData<T>,
+        {T: PointeeSized} *const T,
+        {T: PointeeSized} *mut T,
+        {T: PointeeSized} &T,
+        {T: PointeeSized} &mut T,
 }
 
 /// Types that do not require any pinning guarantees.