diff --git a/libs/evoral/Curve.cc b/libs/evoral/Curve.cc
index a701b61d35..9118201e10 100644
--- a/libs/evoral/Curve.cc
+++ b/libs/evoral/Curve.cc
@@ -200,8 +200,11 @@ Curve::get_vector (Temporal::timepos_t const & x0, Temporal::timepos_t const & x
 }
 
 void
-Curve::_get_vector (Temporal::timepos_t const & x0, Temporal::timepos_t const & x1, float *vec, int32_t veclen) const
+Curve::_get_vector (Temporal::timepos_t x0, Temporal::timepos_t x1, float *vec, int32_t veclen) const
 {
+	x0.set_time_domain (_list.time_domain());
+	x1.set_time_domain (_list.time_domain());
+
 	double rx, lx, hx;
 	const double start = x0.val();
 	const double end = x1.val();
diff --git a/libs/evoral/evoral/Curve.h b/libs/evoral/evoral/Curve.h
index de64e5d1af..167bacea71 100644
--- a/libs/evoral/evoral/Curve.h
+++ b/libs/evoral/evoral/Curve.h
@@ -45,7 +45,7 @@ public:
 private:
 	double multipoint_eval (Temporal::timepos_t const & x) const;
 
-	void _get_vector (Temporal::timepos_t const & x0, Temporal::timepos_t const & x1, float *arg, int32_t veclen) const;
+	void _get_vector (Temporal::timepos_t x0, Temporal::timepos_t x1, float *arg, int32_t veclen) const;
 
 	mutable bool       _dirty;
 	const ControlList& _list;