Unexpected T_OBJECT_OPERATOR in gravatar.module

Drupal 6.2
PHP 4.4.2 (which I think is the root of the problem)

When I try to enable gravatar 6.x-1.2, I get the following error:

Parse error: syntax error, unexpected T_OBJECT_OPERATOR in [redacted...]/sites/all/modules/gravatar/gravatar.module on line 86

This is line 86:

$gravatar = gravatar_get_gravatar(($data->gravatar_email ? $data->gravatar_email : user_load(array('uid' => $account->uid))->mail));

This is a new error to me. A bit of digging makes me think it's an incompatibility between this version of gravatar and PHP 4.