diff --git a/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
index 05111ab5ef..587fbfd6ea 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLElement.cpp
@@ -30,13 +30,18 @@ namespace Web::HTML {
 
 HTMLElement::HTMLElement(DOM::Document& document, DOM::QualifiedName qualified_name)
     : Element(document, move(qualified_name))
-    , m_dataset(DOMStringMap::create(*this))
 {
     set_prototype(&window().cached_web_prototype("HTMLElement"));
 }
 
 HTMLElement::~HTMLElement() = default;
 
+void HTMLElement::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    m_dataset = DOMStringMap::create(*this);
+}
+
 void HTMLElement::visit_edges(Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLElement.h b/Userland/Libraries/LibWeb/HTML/HTMLElement.h
index a40cd1cfd1..399fa3c539 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLElement.h
@@ -52,6 +52,8 @@ public:
 protected:
     HTMLElement(DOM::Document&, DOM::QualifiedName);
 
+    virtual void initialize(JS::Realm&) override;
+
     virtual void parse_attribute(FlyString const& name, String const& value) override;
 
     virtual void visit_edges(Cell::Visitor&) override;
@@ -69,7 +71,7 @@ private:
     };
     ContentEditableState content_editable_state() const;
 
-    JS::NonnullGCPtr<DOMStringMap> m_dataset;
+    JS::GCPtr<DOMStringMap> m_dataset;
 
     // https://html.spec.whatwg.org/multipage/interaction.html#locked-for-focus
     bool m_locked_for_focus { false };