diff --git a/library/std/src/sync/mpsc/cache_aligned.rs b/library/std/src/sync/mpsc/cache_aligned.rs
index f95b0ddd589ac..9197f0d6e6c8c 100644
--- a/library/std/src/sync/mpsc/cache_aligned.rs
+++ b/library/std/src/sync/mpsc/cache_aligned.rs
@@ -1,7 +1,8 @@
 use crate::ops::{Deref, DerefMut};
 
 #[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[repr(align(64))]
+#[cfg_attr(target_arch = "aarch64", repr(align(128)))]
+#[cfg_attr(not(target_arch = "aarch64"), repr(align(64)))]
 pub(super) struct CacheAligned<T>(pub T);
 
 impl<T> Deref for CacheAligned<T> {