drupal 7 - show mandatory state of manage fields table

diff --git a/modules/field_ui/field_ui.admin.inc b/modules/field_ui/field_ui.admin.inc
index 7d09d6f..7faf40f 100644
--- a/modules/field_ui/field_ui.admin.inc
+++ b/modules/field_ui/field_ui.admin.inc
@@ -342,7 +342,7 @@ function field_ui_field_overview_form($form, &$form_state, $entity_type, $bundle
       '#row_type' => 'field',
       '#region_callback' => 'field_ui_field_overview_row_region',
       'label' => array(
-        '#markup' => check_plain($instance['label']),
+        '#markup' => ($instance['required']?'<sup><b><span style="color: #f00;">*</span></b></sup>':'') . check_plain($instance['label']),
       ),
       'weight' => array(
         '#type' => 'textfield',