diff --git a/libs/evoral/SMF.cc b/libs/evoral/SMF.cc
index d5af69dc58..f8af97be0b 100644
--- a/libs/evoral/SMF.cc
+++ b/libs/evoral/SMF.cc
@@ -34,6 +34,7 @@
 #include "libsmf/smf.h"
 
 #include "temporal/tempo.h"
+#include "temporal/beats.h"
 
 #include "evoral/Event.h"
 #include "evoral/SMF.h"
@@ -528,6 +529,21 @@ SMF::end_write(string const & path)
 	fclose(f);
 }
 
+void
+SMF::set_length (Temporal::Beats const & b)
+{
+	if (!_smf) {
+		return;
+	}
+
+	for (uint16_t n = 0; n < _smf->number_of_tracks; ++n) {
+		smf_track_t* trk = smf_get_track_by_number (_smf, n+1);
+		if (trk) {
+			smf_track_add_eot_pulses (trk, (int) floor (b.get_ticks() * ((double) ppqn() / Temporal::ticks_per_beat)));
+		}
+	}
+}
+
 double
 SMF::round_to_file_precision (double val) const
 {
diff --git a/libs/evoral/evoral/SMF.h b/libs/evoral/evoral/SMF.h
index 0c9908cf63..656a63b2ab 100644
--- a/libs/evoral/evoral/SMF.h
+++ b/libs/evoral/evoral/SMF.h
@@ -39,6 +39,7 @@ typedef smf_tempo_struct smf_tempo_t;
 
 namespace Temporal {
 	class TempoMap;
+	class Beats;
 }
 
 namespace Evoral {
@@ -89,6 +90,7 @@ public:
 	void end_write(std::string const &);
 
 	void flush() {};
+	void set_length (Temporal::Beats const &);
 
 	double round_to_file_precision (double val) const;