diff --git a/template.php b/template.php
index 380a7eb057aa94020e27ddba3c2df39e00f0744c..3d7f4d5922d609d87e27091122fcbea2a1053285 100644
--- a/template.php
+++ b/template.php
@@ -85,7 +85,7 @@ function zen_breadcrumb($variables) {
       // Build the breadcrumb trail.
       $output = '<nav class="breadcrumb" role="navigation">';
       $output .= '<h2' . drupal_attributes($variables['title_attributes_array']) . '>' . $variables['title'] . '</h2>';
-      $output .= '<ul><li>' . implode($breadcrumb_separator . '</li><li>', $breadcrumb) . $trailing_separator . '</li></ul>';
+      $output .= '<ol><li>' . implode($breadcrumb_separator . '</li><li>', $breadcrumb) . $trailing_separator . '</li></ol>';
       $output .= '</nav>';
     }
   }