function secondary_avatars( $action, $activity ) {
		switch ( $activity->component ) {
			case 'groups' :
			case 'friends' :
				// Only insert avatar if one exists.
				if ( $secondary_avatar = bp_get_activity_secondary_avatar() ) {
					$reverse_content = strrev( $action );
					$position        = strpos( $reverse_content, 'a<' );
					$action          = substr_replace( $action, $secondary_avatar, -$position - 2, 0 );
				}
				break;
		}

		return $action;
	}