diff --git a/backend/src/graphql/resolver/TransactionLinkResolver.ts b/backend/src/graphql/resolver/TransactionLinkResolver.ts
index 68183af12..468a276f1 100644
--- a/backend/src/graphql/resolver/TransactionLinkResolver.ts
+++ b/backend/src/graphql/resolver/TransactionLinkResolver.ts
@@ -39,6 +39,7 @@ import {
 import { executeTransaction } from './TransactionResolver'
 import { getUserCreation, validateContribution } from './util/creations'
 import { getLastTransaction } from './util/getLastTransaction'
+import QueryLinkResult from '../union/QueryLinkResult'
 
 // TODO: do not export, test it inside the resolver
 export const transactionLinkCode = (date: Date): string => {