diff --git a/Meta/Lagom/Tools/CodeGenerators/GMLCompiler/main.cpp b/Meta/Lagom/Tools/CodeGenerators/GMLCompiler/main.cpp
index 21b3ce5cb01..5eafb9d7e71 100644
--- a/Meta/Lagom/Tools/CodeGenerators/GMLCompiler/main.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/GMLCompiler/main.cpp
@@ -102,10 +102,11 @@ static ErrorOr<String> include_path_for(StringView class_name, LexicalPath const
 }
 
 // Each entry is an include path, without the "#include" itself.
-static ErrorOr<HashTable<String>> extract_necessary_includes(GUI::GML::Object const& gml_hierarchy, LexicalPath const& gml_file_name)
+static ErrorOr<HashTable<String>> extract_necessary_includes(GUI::GML::Object const& gml_hierarchy, LexicalPath const& gml_file_name, bool is_root = false)
 {
     HashTable<String> necessary_includes;
-    TRY(necessary_includes.try_set(TRY(include_path_for(gml_hierarchy.name(), gml_file_name))));
+    if (!is_root)
+        TRY(necessary_includes.try_set(TRY(include_path_for(gml_hierarchy.name(), gml_file_name))));
     if (gml_hierarchy.layout_object() != nullptr)
         TRY(necessary_includes.try_set(TRY(include_path_for(gml_hierarchy.layout_object()->name(), gml_file_name))));
 
@@ -126,6 +127,22 @@ static char const header[] = R"~~~(
 
 )~~~";
 
+static char const class_declaration[] = R"~~~(
+// A barebones definition of @main_class_name@ used to emit the symbol try_create.
+// Requirements:
+// - Inherits from GUI::Widget (indirectly, is declared as 'class')
+// - Has a default ctor
+// - Has declared a compatible static ErrorOr<NonnullRefPtr<@pure_class_name@>> try_create().
+namespace @class_namespace@ {
+class @pure_class_name@ : public GUI::Widget {
+public:
+    @pure_class_name@();
+    static ErrorOr<NonnullRefPtr<@pure_class_name@>> try_create();
+};
+}
+
+)~~~";
+
 static char const function_start[] = R"~~~(
 // Creates a @main_class_name@ and initializes it.
 // This function was auto-generated by the GML compiler.
@@ -350,7 +367,7 @@ static ErrorOr<String> generate_cpp(NonnullRefPtr<GUI::GML::GMLFile> gml, Lexica
     generator.append(header);
 
     auto& main_class = gml->main_class();
-    auto necessary_includes = TRY(extract_necessary_includes(main_class, gml_file_name));
+    auto necessary_includes = TRY(extract_necessary_includes(main_class, gml_file_name, true));
     static String const always_necessary_includes[] = {
         "<AK/Error.h>"_string,
         "<AK/JsonValue.h>"_string,
@@ -367,8 +384,24 @@ static ErrorOr<String> generate_cpp(NonnullRefPtr<GUI::GML::GMLFile> gml, Lexica
     for (auto const& include : necessary_includes)
         generator.appendln(TRY(String::formatted("#include {}", include)));
 
+    auto main_file_header = TRY(include_path_for(main_class.name(), gml_file_name));
+    generator.appendln(TRY(String::formatted("#if __has_include({})", main_file_header)));
+    generator.appendln(TRY(String::formatted("#include {}", main_file_header)));
+    generator.appendln("#else");
+
     // FIXME: Use a UTF-8 aware function once possible.
+    auto ns_position = main_class.name().find_last("::"sv);
+    auto ns = main_class.name().substring_view(0, ns_position.value_or(0));
+    auto pure_class_name = main_class.name().substring_view(ns_position.map([](auto x) { return x + 2; }).value_or(0));
+
+    generator.set("class_namespace", ns);
+    generator.set("pure_class_name", pure_class_name);
     generator.set("main_class_name", main_class.name());
+
+    generator.append(class_declaration);
+
+    generator.appendln("#endif // __has_include(...)");
+
     generator.append(function_start);
     TRY(generate_loader_for_object(main_class, generator.fork(), "main_object"_string, 2, UseObjectConstructor::No));