diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index 0c4e743af0..cd0904a050 100644
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -3591,7 +3591,7 @@ TempoMap::exact_qn_at_frame_locked (const Metrics& metrics, const framepos_t& fr
 		qn = floor (qn) + (floor (((qn - floor (qn)) * (double) sub_num) + 0.5) / sub_num);
 	} else if (sub_num == 1) {
 		/* the gui requested exact musical (BBT) beat */
-		qn = pulse_at_beat_locked (metrics, (floor (beat_at_minute_locked (metrics, minute_at_frame (frame)) + 0.5)) * 4.0);
+		qn = pulse_at_beat_locked (metrics, (floor (beat_at_minute_locked (metrics, minute_at_frame (frame)) + 0.5))) * 4.0;
 	} else if (sub_num == -1) {
 		/* snap to  bar */
 		Timecode::BBT_Time bbt = bbt_at_pulse_locked (metrics, qn / 4.0);