diff --git a/Userland/Libraries/LibWeb/HTML/DOMParser.cpp b/Userland/Libraries/LibWeb/HTML/DOMParser.cpp
index c18582defe..e61fecee5c 100644
--- a/Userland/Libraries/LibWeb/HTML/DOMParser.cpp
+++ b/Userland/Libraries/LibWeb/HTML/DOMParser.cpp
@@ -62,6 +62,7 @@ JS::NonnullGCPtr<DOM::Document> DOMParser::parse_from_string(StringView string,
         // -> Otherwise
         document = DOM::XMLDocument::create(realm(), verify_cast<HTML::Window>(relevant_global_object(*this)).associated_document().url());
         document->set_content_type(Bindings::idl_enum_to_string(type));
+        document->set_document_type(DOM::Document::Type::XML);
 
         // 1. Create an XML parser parse, associated with document, and with XML scripting support disabled.
         XML::Parser parser(string, { .resolve_external_resource = resolve_xml_resource });