diff --git a/intaro.retailcrm/options.php b/intaro.retailcrm/options.php
index 7d0062d2..fdaf5d65 100644
--- a/intaro.retailcrm/options.php
+++ b/intaro.retailcrm/options.php
@@ -85,7 +85,7 @@ if (method_exists(RCrmActions::class, 'customOrderPropList')
 }
 
 //ajax update deliveryServices
-if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && (strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest') && isset($_POST['ajax']) && ($_POST['ajax'] == 1)) {
+if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && (strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest') && isset($_POST['ajax']) && ($_POST['ajax'] === '1')) {
     $api_host = COption::GetOptionString($mid, Constants::CRM_API_HOST_OPTION, 0);
     $api_key = COption::GetOptionString($mid, Constants::CRM_API_KEY_OPTION , 0);
     $api = new RetailCrm\ApiClient($api_host, $api_key);