diff --git a/BTCPayServer/Services/PayjoinClient.cs b/BTCPayServer/Services/PayjoinClient.cs
index b9d28c283..6a7a5f842 100644
--- a/BTCPayServer/Services/PayjoinClient.cs
+++ b/BTCPayServer/Services/PayjoinClient.cs
@@ -109,10 +109,11 @@ namespace BTCPayServer.Services
             if (!signedPSBT.TryGetEstimatedFeeRate(out var originalFeeRate))
                 throw new ArgumentException("signedPSBT should have utxo information", nameof(signedPSBT));
             var originalFee = signedPSBT.GetFee();
-            optionalParameters.MaxAdditionalFeeContribution = MaxFeeBumpContribution is null ?
-                // By default, we want to keep same fee rate and a single additional input
-                originalFeeRate.GetFee(GetVirtualSize(inputScriptType)) :
-                MaxFeeBumpContribution;
+            if (changeOutput is PSBTOutput)
+                optionalParameters.MaxAdditionalFeeContribution = MaxFeeBumpContribution is null ?
+                    // By default, we want to keep same fee rate and a single additional input
+                    originalFeeRate.GetFee(GetVirtualSize(inputScriptType)) :
+                    MaxFeeBumpContribution;
             if (MinimumFeeRate is FeeRate v)
                 optionalParameters.MinFeeRate = v;