diff --git a/Userland/Libraries/LibWeb/DOM/EventTarget.cpp b/Userland/Libraries/LibWeb/DOM/EventTarget.cpp
index 4e2b7886a9..ab81383542 100644
--- a/Userland/Libraries/LibWeb/DOM/EventTarget.cpp
+++ b/Userland/Libraries/LibWeb/DOM/EventTarget.cpp
@@ -124,7 +124,7 @@ void EventTarget::set_event_handler_attribute(FlyString const& name, HTML::Event
 
     RefPtr<DOM::EventListener> listener;
     if (!value.callback.is_null()) {
-        listener = adopt_ref(*new DOM::EventListener(move(value.callback)));
+        listener = adopt_ref(*new DOM::EventListener(move(value.callback), true));
     } else {
         StringBuilder builder;
         builder.appendff("function {}(event) {{\n{}\n}}", name, value.string);
@@ -136,7 +136,7 @@ void EventTarget::set_event_handler_attribute(FlyString const& name, HTML::Event
         }
         auto* function = JS::ECMAScriptFunctionObject::create(target->script_execution_context()->realm().global_object(), name, program->body(), program->parameters(), program->function_length(), nullptr, JS::FunctionKind::Regular, false, false);
         VERIFY(function);
-        listener = adopt_ref(*new DOM::EventListener(JS::make_handle(static_cast<JS::FunctionObject*>(function))));
+        listener = adopt_ref(*new DOM::EventListener(JS::make_handle(static_cast<JS::FunctionObject*>(function)), true));
     }
     if (listener) {
         for (auto& registered_listener : target->listeners()) {