diff --git a/libs/temporal/timeline.cc b/libs/temporal/timeline.cc
index 7025ecc08c..10aca3b308 100644
--- a/libs/temporal/timeline.cc
+++ b/libs/temporal/timeline.cc
@@ -664,7 +664,7 @@ timepos_t::earlier (Temporal::BBT_Offset const & offset) const
 	TempoMap::SharedPtr tm (TempoMap::use());
 
 	if (is_superclock()) {
-		return timepos_t (tm->superclock_at (BBT_Argument (this->superclocks(), tm->bbt_walk (BBT_Argument (this->superclocks(), tm->bbt_at (*this)), -offset))));
+		return timepos_t::from_superclock (tm->superclock_at (tm->bbt_walk (BBT_Argument (this->superclocks(), tm->bbt_at (*this)), -offset)));
 	}
 
 	return timepos_t (tm->bbtwalk_to_quarters (beats(), -offset));