diff --git a/application/models/Customers_model.php b/application/models/Customers_model.php
index 994034fc..b68efffc 100644
--- a/application/models/Customers_model.php
+++ b/application/models/Customers_model.php
@@ -399,7 +399,7 @@ class Customers_model extends EA_Model {
             throw new InvalidArgumentException('Could not find customer record id.');
         }
 
-        return $customer['id'];
+        return (int)$customer['id'];
     }
 
     /**