diff --git a/core/modules/options/options.module b/core/modules/options/options.module
index d3f9298..cc93eac 100644
--- a/core/modules/options/options.module
+++ b/core/modules/options/options.module
@@ -188,10 +188,8 @@ function options_field_settings_form_validate_allowed_values($element, &$form_st
         form_error($element, $form_state, t('Allowed values list: each key must be a string at most 255 characters long.'));
         break;
       }
-      // PHP has problems with typecasting. We've passed other validation so now
-      // make sure we have actual integer keys and not strings if this is an
-      // integer list. To do this we have to remove the old keys and replace
-      // them with specific typecast keys.
+      // Integer list keys that have leading zeros should not be stored as strings
+      // (i.e. "01" must be stored as 1).
       if ($field_type == 'list_integer') {
         unset($values[$key]);
         $key = (int) $key;