diff --git a/sound/usb/card.h b/sound/usb/card.h
index 97acb90..ef580b4 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -153,6 +153,8 @@
 		int channel;
 		int byte_idx;
 	} dsd_dop;
+
+	bool trigger_tstamp_pending_update; /* trigger timestamp being updated from initial estimate */
 };
 
 struct snd_usb_stream {