diff --git a/src/backend/core/http/HttpError.ts b/src/backend/core/http/HttpError.ts
index a9268cb25..0fa7372dd 100644
--- a/src/backend/core/http/HttpError.ts
+++ b/src/backend/core/http/HttpError.ts
@@ -1,5 +1,6 @@
 // NOT ALL OF THEM, ADD OLD ONES AS NEEDED, IF NEEDED. DO NOT ADD NEW ONES THOUGH.
 export type LegacyErrorCodes =
+    | 'payment_account_not_set_up'
     | 'unknown_error'
     | 'disallowed_value'
     | 'invalid_token'