diff --git a/payload_consumer/download_action.h b/payload_consumer/download_action.h
index d0e6000..786db20 100644
--- a/payload_consumer/download_action.h
+++ b/payload_consumer/download_action.h
@@ -166,7 +166,8 @@
 
   // For reporting status to outsiders
   DownloadActionDelegate* delegate_;
-  uint64_t bytes_received_{0};
+  uint64_t bytes_received_{0};  // per file/range
+  uint64_t bytes_received_previous_payloads_{0};
   uint64_t bytes_total_{0};
   bool download_active_{false};