diff --git a/Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp b/Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
index 525d1e21d8..e8f21782f6 100644
--- a/Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
+++ b/Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
@@ -16,6 +16,7 @@
 #include <LibJS/Runtime/TypedArray.h>
 #include <LibWeb/Bindings/ExceptionOrUtils.h>
 #include <LibWeb/DOM/AbortSignal.h>
+#include <LibWeb/HTML/StructuredSerialize.h>
 #include <LibWeb/Streams/AbstractOperations.h>
 #include <LibWeb/Streams/QueuingStrategy.h>
 #include <LibWeb/Streams/ReadableByteStreamController.h>
@@ -3923,6 +3924,18 @@ bool can_transfer_array_buffer(JS::ArrayBuffer const& array_buffer)
     return true;
 }
 
+// https://streams.spec.whatwg.org/#abstract-opdef-structuredclone
+WebIDL::ExceptionOr<JS::Value> structured_clone(JS::Realm& realm, JS::Value value)
+{
+    auto& vm = realm.vm();
+
+    // 1. Let serialized be ? StructuredSerialize(v).
+    auto serialized = TRY(HTML::structured_serialize(vm, value));
+
+    // 2. Return ? StructuredDeserialize(serialized, the current Realm).
+    return TRY(HTML::structured_deserialize(vm, serialized, realm, {}));
+}
+
 // https://streams.spec.whatwg.org/#close-sentinel
 // Non-standard function that implements the "close sentinel" value.
 JS::Value create_close_sentinel()
diff --git a/Userland/Libraries/LibWeb/Streams/AbstractOperations.h b/Userland/Libraries/LibWeb/Streams/AbstractOperations.h
index c7d0d7d31d..2a93eaad28 100644
--- a/Userland/Libraries/LibWeb/Streams/AbstractOperations.h
+++ b/Userland/Libraries/LibWeb/Streams/AbstractOperations.h
@@ -175,6 +175,7 @@ WebIDL::ExceptionOr<void> transform_stream_set_backpressure(TransformStream&, bo
 
 bool is_non_negative_number(JS::Value);
 bool can_transfer_array_buffer(JS::ArrayBuffer const& array_buffer);
+WebIDL::ExceptionOr<JS::Value> structured_clone(JS::Realm&, JS::Value value);
 
 JS::Value create_close_sentinel();
 bool is_close_sentinel(JS::Value);