function bbp_split_topic_form_fields() {
?>

	<input type="hidden" name="action"       id="bbp_post_action" value="bbp-split-topic" />
	<input type="hidden" name="bbp_reply_id" id="bbp_reply_id"    value="<?php echo intval( $_GET['reply_id'] ); ?>" />

	<?php wp_nonce_field( 'bbp-split-topic_' . bbp_get_topic_id() );
}