diff --git a/src/Entity/Customer.php b/src/Entity/Customer.php
index 8255d408..69fd5b3e 100644
--- a/src/Entity/Customer.php
+++ b/src/Entity/Customer.php
@@ -14,6 +14,7 @@ use App\Ramcar\CustomerClassification;
  */
 class Customer
 {
+    // TODO: make this a setting somewhere
     const COUNTRY_CODE_PREFIX = '+60';
 
     // unique id