diff --git a/gtk/gtktypebuiltins.c.template b/gtk/gtktypebuiltins.c.template
deleted file mode 100644
index 844e546b3d..0000000000
--- a/gtk/gtktypebuiltins.c.template
+++ /dev/null
@@ -1,42 +0,0 @@
-/*** BEGIN file-header ***/
-#include "config.h"
-#include "gtk.h"
-#include "gtkprivate.h"
-
-/*** END file-header ***/
-
-/*** BEGIN file-production ***/
-/* enumerations from "@basename@" */
-/*** END file-production ***/
-
-/*** BEGIN value-header ***/
-GType
-@enum_name@_get_type (void)
-{
-  static gsize g_define_type_id__volatile = 0;
-
-  if (g_once_init_enter (&g_define_type_id__volatile))
-    {
-      static const G@Type@Value values[] = {
-/*** END value-header ***/
-
-/*** BEGIN value-production ***/
-        { @VALUENAME@, "@VALUENAME@", "@valuenick@" },
-/*** END value-production ***/
-
-/*** BEGIN value-tail ***/
-        { 0, NULL, NULL }
-      };
-      GType g_define_type_id =
-        g_@type@_register_static (g_intern_static_string ("@EnumName@"), values);
-      g_once_init_leave (&g_define_type_id__volatile, g_define_type_id);
-    }
-
-  return g_define_type_id__volatile;
-}
-
-/*** END value-tail ***/
-
-/*** BEGIN file-tail ***/
-
-/*** END file-tail ***/
diff --git a/gtk/gtktypebuiltins.h.template b/gtk/gtktypebuiltins.h.template
deleted file mode 100644
index 3dc9f834bf..0000000000
--- a/gtk/gtktypebuiltins.h.template
+++ /dev/null
@@ -1,29 +0,0 @@
-/*** BEGIN file-header ***/
-#ifndef __GTK_TYPE_BUILTINS_H__
-#define __GTK_TYPE_BUILTINS_H__
-
-#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
-#error "Only <gtk/gtk.h> can be included directly."
-#endif
-
-#include <glib-object.h>
-#include <gdk/gdk.h>
-
-G_BEGIN_DECLS
-/*** END file-header ***/
-
-/*** BEGIN file-production ***/
-
-/* enumerations from "@basename@" */
-/*** END file-production ***/
-
-/*** BEGIN value-header ***/
-GDK_AVAILABLE_IN_ALL GType @enum_name@_get_type (void) G_GNUC_CONST;
-#define @ENUMPREFIX@_TYPE_@ENUMSHORT@ (@enum_name@_get_type ())
-/*** END value-header ***/
-
-/*** BEGIN file-tail ***/
-G_END_DECLS
-
-#endif /* __GTK_TYPE_BUILTINS_H__ */
-/*** END file-tail ***/
diff --git a/gtk/meson.build b/gtk/meson.build
index 9982cc1678..bfb03d7575 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -1031,10 +1031,11 @@ gtkmarshalers = gnome.genmarshal('gtkmarshalers',
 
 gtkmarshal_h = gtkmarshalers[1]
 
-gtktypebuiltins = gnome.mkenums('gtktypebuiltins',
+gtktypebuiltins = gnome.mkenums_simple('gtktypebuiltins',
   sources: gtk_public_headers + gtk_deprecated_headers,
-  c_template: 'gtktypebuiltins.c.template',
-  h_template: 'gtktypebuiltins.h.template',
+  decorator: 'GDK_AVAILABLE_IN_ALL',
+  body_prefix: '#include "config.h"',
+  header_prefix: '#include <gdk/gdk.h>',
   install_dir: gtk_includedir / 'gtk-4.0/gtk',
   install_header: true,
 )