Notice: Use of undefined constant SERVICE_SLUG - assumed 'SERVICE_SLUG'

Blogs-MU with BP Child themes.

The homepage broken. How to fix this.

Thanks!

error message

Notice: Use of undefined constant SERVICE_SLUG - assumed 'SERVICE_SLUG' in /home/wp24hws/public_html/wp-content/themes/blogs-mu/_inc/functions/services-functions.php on line 2

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Code from services-functions.php

<?php

define(SERVICE_SLUG, 'edit-service-options');

add_action('admin_menu', 'blogsmu_features_register');

function blogsmu_features_register() {

update_services_data_structure();

add_theme_page(_g ( $themename . __(' Services Options',TEMPLATE_DOMAIN)), _g ( __('Services Options',TEMPLATE_DOMAIN)), 'edit_theme_options', SERVICE_SLUG, 'blogsmu_features_page');

}

function blogsmu_features_page() {

global $theme_version, $themename;

echo '<div id="options-panel">

<div id="options-head">

<h2>'.$themename.' '.__("Custom Homepage Options",TD).'</h2>

<div class="theme-versions">'.__("Version",TD).' '.$theme_version.'</div>

</div>

<div id="sbtabs_uploads">

<div class="tabc">

'.(isset($_GET['saved'])?'<div id="message" class="updated fade"><p>'.__('Settings saved.', TD).'</p></div>':'').'

<p>'.__('Service images and text can be added/removed here. These will be shown on your homepage. Optimal image sizes are',TD).' 260px by 150px.</p>

<div class="add_save_panel">

<input type="submit" value="Add Service" class="button add_service">

<input type="submit" value="Save All" class="button-primary save_all">

</div>

'.get_services_form().'

<div class="one_service_template">

'.get_one_service(0).'

</div>