diff --git a/backend/src/graphql/resolvers/TransactionResolver.ts b/backend/src/graphql/resolvers/TransactionResolver.ts
index a601d9575..f90eafff3 100644
--- a/backend/src/graphql/resolvers/TransactionResolver.ts
+++ b/backend/src/graphql/resolvers/TransactionResolver.ts
@@ -231,7 +231,7 @@ export class TransactionResolver {
       email: userEntity.email,
     })
     if (!resultGDTSum.success) throw new Error(resultGDTSum.data)
-    transactions.gdtSum = resultGDTSum.data.sum
+    transactions.gdtSum = resultGDTSum.data.sum || 0
 
     // get balance
     const balanceRepository = getCustomRepository(BalanceRepository)