diff --git a/packages/rpc-subscriptions-api/src/slots-updates-notifications.ts b/packages/rpc-subscriptions-api/src/slots-updates-notifications.ts
index e4e3f7e78..6d33b09ea 100644
--- a/packages/rpc-subscriptions-api/src/slots-updates-notifications.ts
+++ b/packages/rpc-subscriptions-api/src/slots-updates-notifications.ts
@@ -19,6 +19,7 @@ type SlotsUpdatesNotificationsApiNotificationDead = Readonly<{
     SlotsUpdatesNotificationsApiNotificationBase;
 
 type SlotsUpdatesNotificationsApiNotificationFrozen = Readonly<{
+    hash?: string;
     stats: Readonly<{
         maxTransactionsPerEntry: bigint;
         numFailedTransactions: bigint;