diff --git a/includes/WP_Admin.php b/includes/WP_Admin.php
index a83379e51..cce400a7f 100644
--- a/includes/WP_Admin.php
+++ b/includes/WP_Admin.php
@@ -60,7 +60,7 @@ public static function load_php_textdomain() {
 	 */
 	public static function register_page() {
 		\add_submenu_page(
-			null,
+			'',
 			\__( 'Onboarding', 'wp-module-onboarding' ),
 			\__( 'Onboarding', 'wp-module-onboarding' ),
 			Permissions::ADMIN,