diff --git a/backend/mempool-config.sample.json b/backend/mempool-config.sample.json
index 87f9d5f34..b29e8cb7a 100644
--- a/backend/mempool-config.sample.json
+++ b/backend/mempool-config.sample.json
@@ -152,6 +152,7 @@
   },
   "FIAT_PRICE": {
     "ENABLED": true,
+    "PAID": false,
     "API_KEY": "your-api-key-from-freecurrencyapi.com"
   }
 }