diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc
index 73191da257..5cd852ce55 100644
--- a/libs/ardour/ticker.cc
+++ b/libs/ardour/ticker.cc
@@ -218,8 +218,8 @@ out:
 double
 MidiClockTicker::one_ppqn_in_samples (samplepos_t transport_position) const
 {
-	Tempo const & tempo (TempoMap::use()->metric_at (timepos_t (transport_position)).tempo());
-	const double samples_per_quarter_note = tempo.samples_per_quarter_note (_session.nominal_sample_rate());
+	TempoPoint const & tempo (TempoMap::use()->metric_at (timepos_t (transport_position)).tempo());
+	const double samples_per_quarter_note = superclock_to_samples (tempo.superclocks_per_note_type_at (timepos_t (transport_position)), _session.nominal_sample_rate());
 	return samples_per_quarter_note / 24.0;
 }