1 files changed, 6 insertions, 0 deletions
diff --git a/library/std/src/sys/wasm/atomics/thread.rs b/library/std/src/sys/wasm/atomics/thread.rs
index 54bc877aa7d..09714835104 100644
--- a/library/std/src/sys/wasm/atomics/thread.rs
+++ b/library/std/src/sys/wasm/atomics/thread.rs
@@ -1,5 +1,7 @@
+use super::unsupported;
 use crate::ffi::CStr;
 use crate::io;
+use crate::num::NonZeroUsize;
 use crate::sys::unsupported;
 use crate::time::Duration;
 
@@ -39,6 +41,10 @@ impl Thread {
     pub fn join(self) {}
 }
 
+pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+    unsupported()
+}
+
 pub mod guard {
     pub type Guard = !;
     pub unsafe fn current() -> Option<Guard> {