diff --git a/ZUGFeRD/InvoiceDescriptor20Writer.cs b/ZUGFeRD/InvoiceDescriptor20Writer.cs
index 3dfff904..14bf7ddb 100644
--- a/ZUGFeRD/InvoiceDescriptor20Writer.cs
+++ b/ZUGFeRD/InvoiceDescriptor20Writer.cs
@@ -727,7 +727,7 @@ public override void Save(InvoiceDescriptor descriptor, Stream stream, ZUGFeRDFo
                 Writer.WriteValue(_formatDecimal(tradeAllowanceCharge.ActualAmount));
                 Writer.WriteEndElement();
 
-                Writer.WriteOptionalElementString("ram", "ReasonCode", tradeAllowanceCharge.Reason); // BT-98
+                Writer.WriteOptionalElementString("ram", "ReasonCode", tradeAllowanceCharge.ReasonCode.GetDescriptionAttribute()); // BT-98
                 Writer.WriteOptionalElementString("ram", "Reason", tradeAllowanceCharge.Reason); // BT-97
 
                 if (tradeAllowanceCharge.Tax != null)