diff --git a/Tests/LibWeb/TestConfig.ini b/Tests/LibWeb/TestConfig.ini
index 8309f1ec7a9..641e2fb71dd 100644
--- a/Tests/LibWeb/TestConfig.ini
+++ b/Tests/LibWeb/TestConfig.ini
@@ -15,3 +15,4 @@ Text/input/Worker/Worker-importScripts.html
 Text/input/Worker/Worker-location.html
 Text/input/Worker/Worker-module.html
 Text/input/Worker/Worker-performance.html
+Text/input/Worker/Worker-postMessage-transfer.html
diff --git a/Tests/LibWeb/Text/expected/Worker/Worker-postMessage-transfer.txt b/Tests/LibWeb/Text/expected/Worker/Worker-postMessage-transfer.txt
new file mode 100644
index 00000000000..7db7e90e53f
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/Worker/Worker-postMessage-transfer.txt
@@ -0,0 +1 @@
+Message received from worker: Hello, world
diff --git a/Tests/LibWeb/Text/input/Worker/Worker-postMessage-transfer.html b/Tests/LibWeb/Text/input/Worker/Worker-postMessage-transfer.html
new file mode 100644
index 00000000000..7d8b1e9227e
--- /dev/null
+++ b/Tests/LibWeb/Text/input/Worker/Worker-postMessage-transfer.html
@@ -0,0 +1,29 @@
+<script src="../include.js"></script>
+<script>
+    asyncTest((done) => {
+        const workerScript = `
+            self.onmessage = function(evt) {
+                const receivedBuffer = evt.data;
+                self.postMessage(receivedBuffer, [receivedBuffer]);
+            };
+        `;
+
+        const blob = new Blob([workerScript], { type: 'application/javascript' });
+        const workerScriptURL = URL.createObjectURL(blob);
+        const worker = new Worker(workerScriptURL);
+
+        worker.onmessage = function(evt) {
+            const bufTransferredBackFromWorker = evt.data;
+            const decoder = new TextDecoder();
+
+            println('Message received from worker: ' + decoder.decode(bufTransferredBackFromWorker));
+            done();
+        };
+
+        const encoder = new TextEncoder();
+        const message = encoder.encode("Hello, world");
+        const myBuf = message.buffer;
+
+        worker.postMessage(myBuf, [myBuf]);
+    });
+</script>
diff --git a/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.cpp b/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.cpp
index 213c4fee4b8..d8189d32c48 100644
--- a/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.cpp
+++ b/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.cpp
@@ -48,6 +48,7 @@ void DedicatedWorkerGlobalScope::finalize()
     WindowOrWorkerGlobalScopeMixin::finalize();
 }
 
+// https://html.spec.whatwg.org/multipage/workers.html#dom-dedicatedworkerglobalscope-postmessage-options
 WebIDL::ExceptionOr<void> DedicatedWorkerGlobalScope::post_message(JS::Value message, StructuredSerializeOptions const& options)
 {
     // The postMessage(message, transfer) and postMessage(message, options) methods on DedicatedWorkerGlobalScope objects act as if,
@@ -56,6 +57,15 @@ WebIDL::ExceptionOr<void> DedicatedWorkerGlobalScope::post_message(JS::Value mes
     return m_internal_port->post_message(message, options);
 }
 
+// https://html.spec.whatwg.org/multipage/workers.html#dom-dedicatedworkerglobalscope-postmessage
+WebIDL::ExceptionOr<void> DedicatedWorkerGlobalScope::post_message(JS::Value message, Vector<JS::Handle<JS::Object>> const& transfer)
+{
+    // The postMessage(message, transfer) and postMessage(message, options) methods on DedicatedWorkerGlobalScope objects act as if,
+    // when invoked, it immediately invoked the respective postMessage(message, transfer) and postMessage(message, options)
+    // on the port, with the same arguments, and returned the same return value.
+    return m_internal_port->post_message(message, transfer);
+}
+
 #undef __ENUMERATE
 #define __ENUMERATE(attribute_name, event_name)                                        \
     void DedicatedWorkerGlobalScope::set_##attribute_name(WebIDL::CallbackType* value) \
diff --git a/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.h b/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.h
index 15f19116d0a..438a11b2f68 100644
--- a/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.h
+++ b/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.h
@@ -26,6 +26,7 @@ public:
     virtual ~DedicatedWorkerGlobalScope() override;
 
     WebIDL::ExceptionOr<void> post_message(JS::Value message, StructuredSerializeOptions const&);
+    WebIDL::ExceptionOr<void> post_message(JS::Value message, Vector<JS::Handle<JS::Object>> const& transfer);
 
     void set_name(String name) { m_name = move(name); }
     String name() const { return m_name; }
diff --git a/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.idl b/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.idl
index d3084eb0728..0f0aa79ed50 100644
--- a/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.idl
+++ b/Userland/Libraries/LibWeb/HTML/DedicatedWorkerGlobalScope.idl
@@ -5,8 +5,7 @@
 interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
     [Replaceable] readonly attribute DOMString name;
 
-    // FIXME: IDL overload issue here
-    // FIXME: undefined postMessage(any message, sequence<object> transfer);
+    undefined postMessage(any message, sequence<object> transfer);
     undefined postMessage(any message, optional StructuredSerializeOptions options = {});
     undefined close();