diff --git a/src/Qwack.Core/Instruments/InstrumentFactory.cs b/src/Qwack.Core/Instruments/InstrumentFactory.cs
index 497b295e..759d6f4c 100644
--- a/src/Qwack.Core/Instruments/InstrumentFactory.cs
+++ b/src/Qwack.Core/Instruments/InstrumentFactory.cs
@@ -172,7 +172,7 @@ public static IInstrument GetInstrument(this TO_Instrument transportObject, ICur
         public static MultiPeriodBackpricingOption GetBackpricingOption(this TO_MultiPeriodBackpricingOption transportObject, ICurrencyProvider currencyProvider, ICalendarProvider calendarProvider) => new()
         {
             AssetFixingId = transportObject.AssetFixingId,
-            AssetId = transportObject.AssetFixingId,
+            AssetId = transportObject.AssetId,
             CallPut = transportObject.CallPut,
             Counterparty = transportObject.Counterparty,
             PaymentCurrency = currencyProvider.GetCurrencySafe(transportObject.PaymentCurrency),