diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc
index 8fac00b619..a9d39478fd 100644
--- a/libs/backends/dummy/dummy_audiobackend.cc
+++ b/libs/backends/dummy/dummy_audiobackend.cc
@@ -1714,7 +1714,7 @@ DummyPort::pulse_position () const
 {
 	samplecnt_t sr = _dummy_backend.sample_rate ();
 	samplepos_t st = _dummy_backend.sample_time_at_cycle_start();
-	return st % sr;
+	return (sr - (st % sr)) % sr;
 }
 
 /******************************************************************************/