BuddyPress.org

This will do the trick:

<?php global $bp; ?>

<a href="<?php echo bp_core_get_userurl($bp->displayed_user->id) ?>"

title="<?php bp_core_get_user_displayname( $bp->displayed_user->id, true ) ?>">

<?php echo bp_core_get_avatar( $bp->displayed_user->id, 1 ) ?></a>