2 files changed, 2 insertions, 2 deletions
diff --git a/library/alloc/src/lib.rs b/library/alloc/src/lib.rs
index 7aaa4e73df7..a67ea75825d 100644
--- a/library/alloc/src/lib.rs
+++ b/library/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/library/alloc/tests/lib.rs b/library/alloc/tests/lib.rs
index c5c6a122cfe..ffc9a233b66 100644
--- a/library/alloc/tests/lib.rs
+++ b/library/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)]