diff --git a/quic/core/quic_connection.h b/quic/core/quic_connection.h
index 87c049b..c1e95f3 100644
--- a/quic/core/quic_connection.h
+++ b/quic/core/quic_connection.h
@@ -1665,6 +1665,9 @@
 
   const bool advance_ack_timeout_update_ =
       GetQuicReloadableFlag(quic_advance_ack_timeout_update);
+
+  const bool update_ack_alarm_in_send_all_pending_acks_ =
+      GetQuicReloadableFlag(quic_update_ack_alarm_in_send_all_pending_acks);
 };
 
 }  // namespace quic