diff --git a/gtk2_ardour/audio_clock.cc b/gtk2_ardour/audio_clock.cc
index dcbdb11c85..acc1ba3132 100644
--- a/gtk2_ardour/audio_clock.cc
+++ b/gtk2_ardour/audio_clock.cc
@@ -1303,15 +1303,15 @@ AudioClock::set_bbt (timepos_t const & w, timecnt_t const & o, bool /*force*/)
 #ifndef PLATFORM_WINDOWS
 		/* UTF8 1/4 note and 1/8 note ♩ (\u2669) and ♪ (\u266a) are n/a on Windows */
 		if (m.tempo().note_type() == 4) {
-			snprintf (buf, sizeof(buf), "\u2669 = %.3f", m.tempo().note_types_per_minute());
+			snprintf (buf, sizeof(buf), "\u2669 = %.3f", m.tempo().note_types_per_minute_at_DOUBLE (pos));
 			_left_btn.set_text (string_compose ("%1", buf), false);
 		} else if (m.tempo().note_type() == 8) {
-			snprintf (buf, sizeof(buf), "\u266a = %.3f", m.tempo().note_types_per_minute());
+			snprintf (buf, sizeof(buf), "\u266a = %.3f", m.tempo().note_types_per_minute_at_DOUBLE (pos));
 			_left_btn.set_text (string_compose ("%1", buf), false);
 		} else
 #endif
 		{
-			snprintf (buf, sizeof(buf), "1/%d = %.3f",m.tempo().note_type(), m.tempo().note_types_per_minute());
+			snprintf (buf, sizeof(buf), "1/%d = %.3f",m.tempo().note_type(), m.tempo().note_types_per_minute_at_DOUBLE (pos));
 			_left_btn.set_text (buf, false);
 		}