1 files changed, 7 insertions, 0 deletions
diff --git a/op_crates/web/03_abort_signal.js b/op_crates/web/03_abort_signal.js
index 693b5342a..b87a56ce3 100644
--- a/op_crates/web/03_abort_signal.js
+++ b/op_crates/web/03_abort_signal.js
@@ -2,6 +2,7 @@
 "use strict";
 
 ((window) => {
+  const webidl = window.__bootstrap.webidl;
   const { setIsTrusted } = window.__bootstrap.event;
 
   const add = Symbol("add");
@@ -47,6 +48,7 @@
         throw new TypeError("Illegal constructor.");
       }
       super();
+      this[webidl.brand] = webidl.brand;
     }
 
     get aborted() {
@@ -111,6 +113,11 @@
     });
   }
 
+  webidl.converters["AbortSignal"] = webidl.createInterfaceConverter(
+    "AbortSignal",
+    AbortSignal,
+  );
+
   window.AbortSignal = AbortSignal;
   window.AbortController = AbortController;
   window.__bootstrap = window.__bootstrap || {};