function bbp_get_reply_topic_id( $reply_id = 0 ) {
		$reply_id = bbp_get_reply_id( $reply_id );
		$topic_id = (int) get_post_field( 'post_parent', $reply_id );

		// Meta-data fallback
		if ( empty( $topic_id ) ) {
			$topic_id = (int) get_post_meta( $reply_id, '_bbp_topic_id', true );
		}

		// Filter
		if ( ! empty( $topic_id ) ) {
			$topic_id = (int) bbp_get_topic_id( $topic_id );
		}

		// Filter & return
		return (int) apply_filters( 'bbp_get_reply_topic_id', $topic_id, $reply_id );
	}