diff --git a/library/std/src/sys/sync/condvar/xous.rs b/library/std/src/sys/sync/condvar/xous.rs
index cb55a3e3369bd..b9e5f47abfcc2 100644
--- a/library/std/src/sys/sync/condvar/xous.rs
+++ b/library/std/src/sys/sync/condvar/xous.rs
@@ -20,7 +20,6 @@ unsafe impl Sync for Condvar {}
 
 impl Condvar {
     #[inline]
-    #[rustc_const_stable(feature = "const_locks", since = "1.63.0")]
     pub const fn new() -> Condvar {
         Condvar { counter: AtomicUsize::new(0), timed_out: AtomicUsize::new(0) }
     }
diff --git a/library/std/src/sys/sync/mutex/xous.rs b/library/std/src/sys/sync/mutex/xous.rs
index 233e638f9130b..c6b954c1711e6 100644
--- a/library/std/src/sys/sync/mutex/xous.rs
+++ b/library/std/src/sys/sync/mutex/xous.rs
@@ -24,7 +24,6 @@ pub struct Mutex {
 
 impl Mutex {
     #[inline]
-    #[rustc_const_stable(feature = "const_locks", since = "1.63.0")]
     pub const fn new() -> Mutex {
         Mutex { locked: AtomicUsize::new(0), contended: AtomicBool::new(false) }
     }