2 files changed, 4 insertions, 2 deletions
diff --git a/ext/fetch/20_headers.js b/ext/fetch/20_headers.js
index a96d0da3b..29b4540f9 100644
--- a/ext/fetch/20_headers.js
+++ b/ext/fetch/20_headers.js
@@ -431,7 +431,8 @@ webidl.converters["HeadersInit"] = (V, opts) => {
   throw webidl.makeException(
     TypeError,
     "The provided value is not of type '(sequence<sequence<ByteString>> or record<ByteString, ByteString>)'",
-    opts,
+    opts.prefix,
+    opts.context,
   );
 };
 webidl.converters["Headers"] = webidl.createInterfaceConverter(
diff --git a/ext/fetch/23_request.js b/ext/fetch/23_request.js
index 798346ae6..ae3edffd4 100644
--- a/ext/fetch/23_request.js
+++ b/ext/fetch/23_request.js
@@ -341,7 +341,8 @@ class Request {
         throw webidl.makeException(
           TypeError,
           "`client` must be a Deno.HttpClient",
-          { prefix, context: "Argument 2" },
+          prefix,
+          "Argument 2",
         );
       }
       request.clientRid = init.client?.rid ?? null;