diff --git a/src/mono/mono/utils/mono-threads-wasm.h b/src/mono/mono/utils/mono-threads-wasm.h
index f59e71e6d90238..ad9dc40b32db09 100644
--- a/src/mono/mono/utils/mono-threads-wasm.h
+++ b/src/mono/mono/utils/mono-threads-wasm.h
@@ -34,12 +34,21 @@ mono_wasm_dump_threads_async (void);
 gboolean
 mono_threads_wasm_is_deputy_thread (void);
 
+gboolean
+mono_threads_wasm_is_io_thread (void);
+
 MonoNativeThreadId
 mono_threads_wasm_deputy_thread_tid (void);
 
+MonoNativeThreadId
+mono_threads_wasm_io_thread_tid (void);
+
 MonoNativeThreadId
 mono_wasm_create_deputy_thread (void);
 
+MonoNativeThreadId
+mono_wasm_create_io_thread (void);
+
 void
 mono_wasm_register_ui_thread (void);