diff --git a/modules/tax/commerce_tax.module b/modules/tax/commerce_tax.module
index 8e60e72..1c5b2f2 100644
--- a/modules/tax/commerce_tax.module
+++ b/modules/tax/commerce_tax.module
@@ -364,8 +364,9 @@ function commerce_tax_field_attach_form($entity_type, $entity, &$form, &$form_st
             }
 
             // If there is only one option group, flatten the options array.
-            if (count($options) == 1) {
-              $options = reset($options);
+            $form_options = $options;
+            if (count($form_options) == 1) {
+              $form_options = reset($form_options);
             }
 
             $form[$key][$form[$key]['#language']][$delta]['currency_code']['#title'] = ' ';
@@ -374,7 +375,7 @@ function commerce_tax_field_attach_form($entity_type, $entity, &$form, &$form_st
               '#type' => 'select',
               '#title' => t('Include tax in this price'),
               '#description' => t('Saving prices tax inclusive will bypass later calculations for the specified tax.'),
-              '#options' => $options,
+              '#options' => $form_options,
               '#default_value' => $default,
               '#required' => FALSE,
               '#empty_value' => '',