diff --git a/alloc/src/lib.rs b/alloc/src/lib.rs
index 7aaa4e73df72c..a67ea75825de3 100644
--- a/alloc/src/lib.rs
+++ b/alloc/src/lib.rs
@@ -164,13 +164,13 @@
 //
 // Language features:
 // tidy-alphabetical-start
+#![cfg_attr(bootstrap, feature(const_mut_refs))]
 #![cfg_attr(not(test), feature(coroutine_trait))]
 #![cfg_attr(test, feature(panic_update_hook))]
 #![cfg_attr(test, feature(test))]
 #![feature(allocator_internals)]
 #![feature(allow_internal_unstable)]
 #![feature(cfg_sanitize)]
-#![feature(const_mut_refs)]
 #![feature(const_precise_live_drops)]
 #![feature(const_ptr_write)]
 #![feature(const_try)]
diff --git a/alloc/tests/lib.rs b/alloc/tests/lib.rs
index c5c6a122cfec8..ffc9a233b665d 100644
--- a/alloc/tests/lib.rs
+++ b/alloc/tests/lib.rs
@@ -6,7 +6,7 @@
 #![feature(cow_is_borrowed)]
 #![feature(const_cow_is_borrowed)]
 #![feature(const_heap)]
-#![feature(const_mut_refs)]
+#![cfg_attr(bootstrap, feature(const_mut_refs))]
 #![feature(const_slice_from_raw_parts_mut)]
 #![feature(const_ptr_write)]
 #![feature(const_try)]
diff --git a/core/src/lib.rs b/core/src/lib.rs
index 5b5d5d1a9610e..d503e58423f85 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -191,6 +191,7 @@
 //
 // Language features:
 // tidy-alphabetical-start
+#![cfg_attr(bootstrap, feature(const_mut_refs))]
 #![feature(abi_unadjusted)]
 #![feature(adt_const_params)]
 #![feature(allow_internal_unsafe)]
@@ -201,7 +202,6 @@
 #![feature(cfg_target_has_atomic_equal_alignment)]
 #![feature(cfg_ub_checks)]
 #![feature(const_for)]
-#![feature(const_mut_refs)]
 #![feature(const_precise_live_drops)]
 #![feature(const_refs_to_cell)]
 #![feature(decl_macro)]
diff --git a/core/src/ptr/mut_ptr.rs b/core/src/ptr/mut_ptr.rs
index ddb9195d2e7c7..5fa3b9bf61f7f 100644
--- a/core/src/ptr/mut_ptr.rs
+++ b/core/src/ptr/mut_ptr.rs
@@ -1569,7 +1569,7 @@ impl<T: ?Sized> *mut T {
     ///
     /// ```
     /// #![feature(const_pointer_is_aligned)]
-    /// #![feature(const_mut_refs)]
+    /// # #![cfg_attr(bootstrap, feature(const_mut_refs))]
     ///
     /// // On some platforms, the alignment of primitives is less than their size.
     /// #[repr(align(4))]
@@ -1695,7 +1695,7 @@ impl<T: ?Sized> *mut T {
     /// ```
     /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
-    /// #![feature(const_mut_refs)]
+    /// # #![cfg_attr(bootstrap, feature(const_mut_refs))]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
     /// #[repr(align(4))]
diff --git a/core/tests/lib.rs b/core/tests/lib.rs
index dbceb8abafc84..948ea9bc098be 100644
--- a/core/tests/lib.rs
+++ b/core/tests/lib.rs
@@ -1,4 +1,5 @@
 // tidy-alphabetical-start
+#![cfg_attr(bootstrap, feature(const_mut_refs))]
 #![cfg_attr(target_has_atomic = "128", feature(integer_atomics))]
 #![cfg_attr(test, feature(cfg_match))]
 #![feature(alloc_layout_extra)]
@@ -26,7 +27,6 @@
 #![feature(const_ipv6)]
 #![feature(const_likely)]
 #![feature(const_maybe_uninit_as_mut_ptr)]
-#![feature(const_mut_refs)]
 #![feature(const_nonnull_new)]
 #![feature(const_option)]
 #![feature(const_option_ext)]
diff --git a/std/src/lib.rs b/std/src/lib.rs
index 60969af3e8541..bc5369ddc3daa 100644
--- a/std/src/lib.rs
+++ b/std/src/lib.rs
@@ -272,6 +272,7 @@
 //
 // Language features:
 // tidy-alphabetical-start
+#![cfg_attr(bootstrap, feature(const_mut_refs))]
 #![feature(alloc_error_handler)]
 #![feature(allocator_internals)]
 #![feature(allow_internal_unsafe)]
@@ -281,7 +282,6 @@
 #![feature(cfg_target_thread_local)]
 #![feature(cfi_encoding)]
 #![feature(concat_idents)]
-#![feature(const_mut_refs)]
 #![feature(decl_macro)]
 #![feature(deprecated_suggestion)]
 #![feature(doc_cfg)]