diff --git a/packages/taler-wallet-core/src/operations/balance.ts b/packages/taler-wallet-core/src/operations/balance.ts
index 2c57f8af8..27b801804 100644
--- a/packages/taler-wallet-core/src/operations/balance.ts
+++ b/packages/taler-wallet-core/src/operations/balance.ts
@@ -379,6 +379,9 @@ export async function getMerchantPaymentBalanceDetails(
     ])
     .runReadOnly(async (tx) => {
       await tx.coinAvailability.iter().forEach((ca) => {
+        if (ca.currency != req.currency) {
+          return;
+        }
         const singleCoinAmount: AmountJson = {
           currency: ca.currency,
           fraction: ca.amountFrac,
@@ -413,6 +416,9 @@ export async function getMerchantPaymentBalanceDetails(
       });
 
       await tx.refreshGroups.iter().forEach((r) => {
+        if (r.currency != req.currency) {
+          return;
+        }
         d.balanceAvailable = Amounts.add(
           d.balanceAvailable,
           computeRefreshGroupAvailableAmount(r),