I'm getting this error in my logs, how can I solve this? Here is error and the file it relates to. This is line 15:

```
<?php if (!$isCustomerLogged): ?>

```

> 
> ERR (3): Notice: Undefined variable: isCustomerLogged in
> /domains/dev.domain.co.uk/http/app/design/frontend/base/default/template/detailedreview/wrapper.phtml
> on line 15
> 
> 
> 

```
<?php if (!$isCustomerLogged): ?>
    <div class="login-dialog-block" style="display: none;">
        <div class="login-dialog-container">
            <?php echo $this->getChildHtml('customer_form_login');?>
            <?php echo $this->getChildHtml('customer_form_register');?>
        </div>
        <div class="clearer"></div>
    </div>
<?php endif;?>

```