diff --git a/library/std/src/sys/unix/locks/mod.rs b/library/std/src/sys/unix/locks/mod.rs
index 17796f8894b5d..3e39c8b9b23e7 100644
--- a/library/std/src/sys/unix/locks/mod.rs
+++ b/library/std/src/sys/unix/locks/mod.rs
@@ -2,6 +2,7 @@ cfg_if::cfg_if! {
     if #[cfg(any(
         target_os = "linux",
         target_os = "android",
+        all(target_os = "emscripten", target_feature = "atomics"),
     ))] {
         mod futex;
         mod futex_rwlock;