diff --git a/usps_api_bridge.php b/usps_api_bridge.php
index 27b1962..6dae81d 100644
--- a/usps_api_bridge.php
+++ b/usps_api_bridge.php
@@ -376,6 +376,7 @@ class Usps_Api_Bridge extends Module
      */
     private function mapServiceCodeToApiClass($oldCode, $isInternational)
     {
+        $this->externalLog(['mapServiceCodeToApiClass' => ['oldCode' => $oldCode, 'isInternational' => $isInternational]]);
         // 1. Define the Standard Map
         $map = [
             // DOMESTIC