diff --git a/lib/compat/wordpress-6.6/rest-api.php b/lib/compat/wordpress-6.6/rest-api.php
index 049a58a70d39f7..109865c821a391 100644
--- a/lib/compat/wordpress-6.6/rest-api.php
+++ b/lib/compat/wordpress-6.6/rest-api.php
@@ -77,12 +77,14 @@ function gutenberg_add_class_list_to_public_post_types() {
 }
 add_action( 'rest_api_init', 'gutenberg_add_class_list_to_public_post_types' );
 
-/**
- * Registers the Edit Site Export REST API routes.
- */
-function gutenberg_register_edit_site_export_controller_endpoints() {
-	$edit_site_export_controller = new Gutenberg_REST_Edit_Site_Export_Controller_6_6();
-	$edit_site_export_controller->register_routes();
+if ( ! function_exists( 'gutenberg_register_edit_site_export_controller_endpoints' ) ) {
+	/**
+	 * Registers the Edit Site Export REST API routes.
+	 */
+	function gutenberg_register_edit_site_export_controller_endpoints() {
+		$edit_site_export_controller = new Gutenberg_REST_Edit_Site_Export_Controller_6_6();
+		$edit_site_export_controller->register_routes();
+	}
 }
 
 add_action( 'rest_api_init', 'gutenberg_register_edit_site_export_controller_endpoints' );