2 files changed, 10 insertions, 12 deletions
diff --git a/runtime/js/11_workers.js b/runtime/js/11_workers.js
index f8ed122b8..b08a5737e 100644
--- a/runtime/js/11_workers.js
+++ b/runtime/js/11_workers.js
@@ -202,7 +202,7 @@ class Worker extends EventTarget {
 
   postMessage(message, transferOrOptions = {}) {
     const prefix = "Failed to execute 'postMessage' on 'MessagePort'";
-    webidl.requiredArguments(arguments.length, 1, { prefix });
+    webidl.requiredArguments(arguments.length, 1, prefix);
     message = webidl.converters.any(message);
     let options;
     if (
@@ -212,16 +212,15 @@ class Worker extends EventTarget {
     ) {
       const transfer = webidl.converters["sequence<object>"](
         transferOrOptions,
-        { prefix, context: "Argument 2" },
+        prefix,
+        "Argument 2",
       );
       options = { transfer };
     } else {
       options = webidl.converters.StructuredSerializeOptions(
         transferOrOptions,
-        {
-          prefix,
-          context: "Argument 2",
-        },
+        prefix,
+        "Argument 2",
       );
     }
     const { transfer } = options;
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index 0ed692f3c..01cf2973c 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -101,7 +101,7 @@ function workerClose() {
 function postMessage(message, transferOrOptions = {}) {
   const prefix =
     "Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope'";
-  webidl.requiredArguments(arguments.length, 1, { prefix });
+  webidl.requiredArguments(arguments.length, 1, prefix);
   message = webidl.converters.any(message);
   let options;
   if (
@@ -111,16 +111,15 @@ function postMessage(message, transferOrOptions = {}) {
   ) {
     const transfer = webidl.converters["sequence<object>"](
       transferOrOptions,
-      { prefix, context: "Argument 2" },
+      prefix,
+      "Argument 2",
     );
     options = { transfer };
   } else {
     options = webidl.converters.StructuredSerializeOptions(
       transferOrOptions,
-      {
-        prefix,
-        context: "Argument 2",
-      },
+      prefix,
+      "Argument 2",
     );
   }
   const { transfer } = options;