diff --git a/WooCommerce/v2/Order.cs b/WooCommerce/v2/Order.cs
index 1225906..a921e92 100644
--- a/WooCommerce/v2/Order.cs
+++ b/WooCommerce/v2/Order.cs
@@ -705,11 +705,12 @@ public class OrderFeeLine : JsonObject
         /// </summary>
         public decimal? total { get; set; }
 
+        [DataMember(EmitDefaultValue = false, Name = "total_tax")]
+        protected object total_taxValue { get; set; }
         /// <summary>
         /// Line total tax (after discounts). 
         /// read-only
         /// </summary>
-        [DataMember(EmitDefaultValue = false)]
         public decimal? total_tax { get; set; }
 
         /// <summary>