diff --git a/Userland/Libraries/LibWeb/HTML/Worker.cpp b/Userland/Libraries/LibWeb/HTML/Worker.cpp
index 0ab93578a32..f79ee851d11 100644
--- a/Userland/Libraries/LibWeb/HTML/Worker.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Worker.cpp
@@ -132,6 +132,16 @@ WebIDL::ExceptionOr<void> Worker::post_message(JS::Value message, StructuredSeri
     return m_outside_port->post_message(message, options);
 }
 
+// https://html.spec.whatwg.org/multipage/workers.html#dom-worker-postmessage
+WebIDL::ExceptionOr<void> Worker::post_message(JS::Value message, Vector<JS::Handle<JS::Object>> const& transfer)
+{
+    // The postMessage(message, transfer) and postMessage(message, options) methods on Worker objects act as if,
+    // when invoked, they 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_outside_port->post_message(message, transfer);
+}
+
 #undef __ENUMERATE
 #define __ENUMERATE(attribute_name, event_name)                    \
     void Worker::set_##attribute_name(WebIDL::CallbackType* value) \
diff --git a/Userland/Libraries/LibWeb/HTML/Worker.h b/Userland/Libraries/LibWeb/HTML/Worker.h
index c66f6ac528d..a60c4a411b3 100644
--- a/Userland/Libraries/LibWeb/HTML/Worker.h
+++ b/Userland/Libraries/LibWeb/HTML/Worker.h
@@ -36,6 +36,7 @@ public:
     WebIDL::ExceptionOr<void> terminate();
 
     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);
 
     virtual ~Worker() = default;
 
diff --git a/Userland/Libraries/LibWeb/HTML/Worker.idl b/Userland/Libraries/LibWeb/HTML/Worker.idl
index 1980c0ce0d2..c7ef2855e10 100644
--- a/Userland/Libraries/LibWeb/HTML/Worker.idl
+++ b/Userland/Libraries/LibWeb/HTML/Worker.idl
@@ -10,8 +10,7 @@ interface Worker : EventTarget {
     constructor(DOMString scriptURL, optional WorkerOptions options = {});
 
     undefined terminate();
-    // 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 = {});
 
     attribute EventHandler onmessage;