diff --git a/runtime/js/40_fs_events.js b/runtime/js/40_fs_events.js
index 4c7050b9fd..21d552111b 100644
--- a/runtime/js/40_fs_events.js
+++ b/runtime/js/40_fs_events.js
@@ -60,7 +60,7 @@ class FsWatcher {
   }
 
   close() {
-    core.close(this.rid);
+    core.close(this.#rid);
   }
 
   [SymbolAsyncIterator]() {