diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index 5b02e711aab2d..c35389d44f9fc 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -231,6 +231,7 @@
 #![feature(assert_matches)]
 #![feature(associated_type_bounds)]
 #![feature(async_iterator)]
+#![feature(atomic_mut_ptr)]
 #![feature(bench_black_box)]
 #![feature(box_syntax)]
 #![feature(c_unwind)]