diff --git uc_po.module uc_po.module
index 6feae37..a5c046a 100644
--- uc_po.module
+++ uc_po.module
@@ -43,6 +43,7 @@ function uc_po_perm() {
  * Implementation of hook_token_values().
  */
 function uc_po_token_values($type, $object = NULL) {
+  $values = array();
   // Declare to the token module the value for the [po-number] token.
   switch ($type) {
     case 'order':
@@ -57,6 +58,7 @@ function uc_po_token_values($type, $object = NULL) {
  * Implementation of hook_token_list().
  */
 function uc_po_token_list($type = 'all') {
+  $tokens = array();
   // When listing the available values for order tokens, include [po-number].
   if ($type == 'uc_order') {
     $tokens['uc_order']['po-number'] = t('The PO number for the order if one exists.');