function bbp_user_add_role_to_signup_meta( $meta = array() ) {

	// Posted role
	$forum_role = isset( $_POST['bbp-forums-role'] )
		? sanitize_key( $_POST['bbp-forums-role'] )
		: bbp_get_default_role();

	// Role keys
	$roles = array_keys( bbp_get_dynamic_roles() );

	// Bail if posted role is not in dynamic roles
	if ( empty( $forum_role ) || ! in_array( $forum_role, $roles, true ) ) {
		return $meta;
	}

	// Add role to meta
	$meta['bbp_new_role'] = $forum_role;

	// Return meta
	return $meta;
}