diff --git a/modules/uc_recurring_product/uc_recurring_product.module b/modules/uc_recurring_product/uc_recurring_product.module
index 0610bcf..279179f 100644
--- a/modules/uc_recurring_product/uc_recurring_product.module
+++ b/modules/uc_recurring_product/uc_recurring_product.module
@@ -94,7 +94,7 @@ function uc_recurring_product_feature_form($form, &$form_state, $node, $feature)
   $form['interval']['initial']['initial_charge_value'] = array(
     '#type' => 'select',
     '#title' => t(''),
-    '#options' => drupal_map_assoc(uc_range(0, 52)),
+    '#options' => drupal_map_assoc(range(0, 52)),
     '#default_value' => isset($product->initial_charge_value) ? $product->initial_charge_value : 1,
   );
   $form['interval']['initial']['initial_charge_unit'] = array(
@@ -117,7 +117,7 @@ function uc_recurring_product_feature_form($form, &$form_state, $node, $feature)
   );
   $form['interval']['regular']['regular_interval_value'] = array(
     '#type' => 'select',
-    '#options' => drupal_map_assoc(uc_range(1, 52)),
+    '#options' => drupal_map_assoc(range(1, 52)),
     '#default_value' => isset($product->regular_interval_value) ? $product->regular_interval_value : 1,
   );
   $form['interval']['regular']['regular_interval_unit'] = array(
diff --git a/uc_recurring.admin.inc b/uc_recurring.admin.inc
index cabbc3b..79dc183 100644
--- a/uc_recurring.admin.inc
+++ b/uc_recurring.admin.inc
@@ -258,7 +258,7 @@ function uc_recurring_admin_edit_form($form, $form_state, $rfid, $fee_handler) {
     );
     $form['regular']['regular_interval_value'] = array(
       '#type' => 'select',
-      '#options' => drupal_map_assoc(uc_range(1, 52)),
+      '#options' => drupal_map_assoc(range(1, 52)),
       '#default_value' => $fee->regular_interval_value,
     );
     $form['regular']['regular_interval_unit'] = array(