diff --git a/Libraries/LibJS/Runtime/VM.cpp b/Libraries/LibJS/Runtime/VM.cpp
index b1739c03c3..0340e60dd4 100644
--- a/Libraries/LibJS/Runtime/VM.cpp
+++ b/Libraries/LibJS/Runtime/VM.cpp
@@ -37,12 +37,12 @@
 
 namespace JS {
 
-NonnullRefPtr<VM> VM::create(OwnPtr<Agent> agent)
+NonnullRefPtr<VM> VM::create()
 {
     ErrorMessages error_messages {};
     error_messages[to_underlying(ErrorMessage::OutOfMemory)] = ErrorType::OutOfMemory.message();
 
-    auto vm = adopt_ref(*new VM(move(agent), move(error_messages)));
+    auto vm = adopt_ref(*new VM(move(error_messages)));
 
     WellKnownSymbols well_known_symbols {
 #define __JS_ENUMERATE(SymbolName, snake_name) \
@@ -63,12 +63,11 @@ static constexpr auto make_single_ascii_character_strings(IndexSequence<code_poi
 
 static constexpr auto single_ascii_character_strings = make_single_ascii_character_strings(MakeIndexSequence<128>());
 
-VM::VM(OwnPtr<Agent> agent, ErrorMessages error_messages)
+VM::VM(ErrorMessages error_messages)
     : m_heap(this, [this](HashMap<GC::Cell*, GC::HeapRoot>& roots) {
         gather_roots(roots);
     })
     , m_error_messages(move(error_messages))
-    , m_agent(move(agent))
 {
     m_bytecode_interpreter = make<Bytecode::Interpreter>(*this);
 
diff --git a/Libraries/LibJS/Runtime/VM.h b/Libraries/LibJS/Runtime/VM.h
index adc87b3793..e2666dd649 100644
--- a/Libraries/LibJS/Runtime/VM.h
+++ b/Libraries/LibJS/Runtime/VM.h
@@ -47,7 +47,7 @@ enum class EvalMode {
 
 class VM : public RefCounted<VM> {
 public:
-    static NonnullRefPtr<VM> create(OwnPtr<Agent> = {});
+    static NonnullRefPtr<VM> create();
     ~VM();
 
     GC::Heap& heap() { return m_heap; }
@@ -240,6 +240,7 @@ public:
     Function<void(Promise&)> on_promise_rejection_handled;
     Function<void(Object const&, PropertyKey const&)> on_unimplemented_property_access;
 
+    void set_agent(OwnPtr<Agent> agent) { m_agent = move(agent); }
     Agent* agent() { return m_agent; }
     Agent const* agent() const { return m_agent; }
 
@@ -290,7 +291,7 @@ private:
 #undef __JS_ENUMERATE
     };
 
-    VM(OwnPtr<Agent>, ErrorMessages);
+    explicit VM(ErrorMessages);
 
     void load_imported_module(ImportedModuleReferrer, ModuleRequest const&, GC::Ptr<GraphLoadingState::HostDefined>, ImportedModulePayload);
     ThrowCompletionOr<void> link_and_eval_module(CyclicModule&);
diff --git a/Libraries/LibWeb/Bindings/MainThreadVM.cpp b/Libraries/LibWeb/Bindings/MainThreadVM.cpp
index 650c9bfe14..83a9843487 100644
--- a/Libraries/LibWeb/Bindings/MainThreadVM.cpp
+++ b/Libraries/LibWeb/Bindings/MainThreadVM.cpp
@@ -76,7 +76,8 @@ void initialize_main_thread_vm(HTML::EventLoop::Type type)
 {
     VERIFY(!s_main_thread_vm);
 
-    s_main_thread_vm = JS::VM::create(make<HTML::SimilarOriginWindowAgent>());
+    s_main_thread_vm = JS::VM::create();
+    s_main_thread_vm->set_agent(make<HTML::SimilarOriginWindowAgent>());
 
     auto& agent = as<HTML::Agent>(*s_main_thread_vm->agent());
     agent.event_loop = s_main_thread_vm->heap().allocate<HTML::EventLoop>(type);