diff --git a/src/Formatting.fs b/src/Formatting.fs
index cc4336c..42a2fd4 100644
--- a/src/Formatting.fs
+++ b/src/Formatting.fs
@@ -118,7 +118,7 @@ module Formatting =
                 go.GoParameters.FeesAndCharges.Fees |> Array.isEmpty |> feesProperties
                 go.GoParameters.FeesAndCharges.Charges |> Array.isEmpty |> chargesProperties
                 (match go.GoPurpose with IntendedPurpose.Settlement _ -> false | _ -> true) |> quoteProperties
-                (match go.GoParameters.Interest.Method with Interest.Method.AddOn _ -> false | _ -> true) |> interestProperties
+                (match go.GoParameters.Interest.Method with Interest.Method.AddOn -> false | _ -> true) |> interestProperties
                 go.GoExtra |> not |> extraProperties
             |]
             |> Array.concat