I'm modifying a Drupal template and keep having a problem with this.

ERROR
Fatal error: Call to undefined function: marinelli_width() in /home/content/b/.../html/themes/marinelli/page.tpl.php on line 80

page.tpl.php (Line 80)
Code:
  <div id="primary" style=<?php print '"width:'.marinelli_width( $left, $right).'px;">' ?>
template.php
Code:
function marinelli_width($left, $right) {
  $width = 340;
  if (!$left ) {
    $width = $width +190;
  }  
  
   if (!$right) {
    $width = $width +190;
  }
  return $width;
}