diff --git a/backend/src/api/bitcoin/esplora-api.ts b/backend/src/api/bitcoin/esplora-api.ts
index 2ad72f728..fe152e2a3 100644
--- a/backend/src/api/bitcoin/esplora-api.ts
+++ b/backend/src/api/bitcoin/esplora-api.ts
@@ -101,6 +101,7 @@ class FailoverRouter {
         }
         host.unreachable = false;
       } else {
+        host.outOfSync = true;
         host.unreachable = true;
       }
     }