diff --git a/library/core/src/ptr/mod.rs b/library/core/src/ptr/mod.rs
index 1ad9af1549a4..f41be46abc96 100644
--- a/library/core/src/ptr/mod.rs
+++ b/library/core/src/ptr/mod.rs
@@ -691,7 +691,7 @@ pub fn from_exposed_addr_mut<T>(addr: usize) -> *mut T
 #[inline(always)]
 #[must_use]
 #[unstable(feature = "ptr_from_ref", issue = "106116")]
-pub fn from_ref<T: ?Sized>(r: &T) -> *const T {
+pub const fn from_ref<T: ?Sized>(r: &T) -> *const T {
     r
 }
 
@@ -702,7 +702,7 @@ pub fn from_ref<T: ?Sized>(r: &T) -> *const T {
 #[inline(always)]
 #[must_use]
 #[unstable(feature = "ptr_from_ref", issue = "106116")]
-pub fn from_mut<T: ?Sized>(r: &mut T) -> *mut T {
+pub const fn from_mut<T: ?Sized>(r: &mut T) -> *mut T {
     r
 }