diff --git a/packages/taler-harness/src/harness/harness.ts b/packages/taler-harness/src/harness/harness.ts
index 0c05ddb2e..b0f411a8c 100644
--- a/packages/taler-harness/src/harness/harness.ts
+++ b/packages/taler-harness/src/harness/harness.ts
@@ -1078,7 +1078,7 @@ export class ExchangeService implements ExchangeServiceInterface {
     const config = new Configuration();
     config.setString("taler", "currency", e.currency);
     // Required by the exchange but not really used yet.
-    config.setString("taler", "aml_threshold", `${e.currency}:1000000`);
+    config.setString("exchange", "aml_threshold", `${e.currency}:1000000`);
     config.setString(
       "taler",
       "currency_round_unit",