diff --git a/CRM/Utils/Migrate/Import.php b/CRM/Utils/Migrate/Import.php
index 00f5b115d110..802e2647deca 100644
--- a/CRM/Utils/Migrate/Import.php
+++ b/CRM/Utils/Migrate/Import.php
@@ -160,7 +160,7 @@ public function optionValues(&$xml, &$idMap) {
         $optionValue->option_group_id = $idMap['option_group'][(string ) $optionValueXML->option_group_name];
         if (empty($optionValue->option_group_id)) {
           //CRM-17410 check if option group already exist.
-          $optionValue->option_group_id = CRM_Core_DAO::getFieldValue('CRM_Core_DAO_OptionGroup', $optionValueXML->option_group_name, 'id', 'name');
+          $optionValue->option_group_id = CRM_Core_DAO::getFieldValue('CRM_Core_DAO_OptionGroup', (string) $optionValueXML->option_group_name, 'id', 'name');
         }
         $this->copyData($optionValue, $optionValueXML, FALSE, 'label');
         if (!isset($optionValue->value)) {