diff --git a/libs/ardour/ardour/location.h b/libs/ardour/ardour/location.h
index d31277ee71..f55f931731 100644
--- a/libs/ardour/ardour/location.h
+++ b/libs/ardour/ardour/location.h
@@ -23,6 +23,7 @@
 #include <list>
 #include <iostream>
 #include <map>
+#include <ctime>
 
 #include <sys/types.h>
 
@@ -69,6 +70,7 @@ public:
 	void lock ();
 	void unlock ();
 
+	time_t timestamp() { return _timestamp; };
 	samplepos_t start() const { return _start; }
 	samplepos_t end() const { return _end; }
 	samplecnt_t length() const { return _end - _start; }
@@ -160,6 +162,7 @@ private:
 	bool               _locked;
 	PositionLockStyle  _position_lock_style;
 	boost::shared_ptr<SceneChange> _scene_change;
+	time_t             _timestamp;
 
 	void set_mark (bool yn);
 	bool set_flag_internal (bool yn, Flags flag);
diff --git a/libs/ardour/location.cc b/libs/ardour/location.cc
index 24774c5fec..1b4b5a87c1 100644
--- a/libs/ardour/location.cc
+++ b/libs/ardour/location.cc
@@ -65,6 +65,7 @@ Location::Location (Session& s)
 	, _flags (Flags (0))
 	, _locked (false)
 	, _position_lock_style (AudioTime)
+	, _timestamp(time(0))
 {
 	assert (_start >= 0);
 	assert (_end >= 0);
@@ -79,7 +80,7 @@ Location::Location (Session& s, samplepos_t sample_start, samplepos_t sample_end
 	, _flags (bits)
 	, _locked (false)
 	, _position_lock_style (s.config.get_glue_new_markers_to_bars_and_beats() ? MusicTime : AudioTime)
-
+	, _timestamp(time(0))
 {
 	recompute_beat_from_samples (sub_num);
 
@@ -97,7 +98,7 @@ Location::Location (const Location& other)
 	, _end_beat (other._end_beat)
 	, _flags (other._flags)
 	, _position_lock_style (other._position_lock_style)
-
+	, _timestamp(time(0))
 {
 	/* copy is not locked even if original was */
 
@@ -113,6 +114,7 @@ Location::Location (Session& s, const XMLNode& node)
 	: SessionHandleRef (s)
 	, _flags (Flags (0))
 	, _position_lock_style (AudioTime)
+	, _timestamp(time(0))
 {
 	/* Note: _position_lock_style is initialised above in case set_state doesn't set it
 	   (for 2.X session file compatibility).
@@ -599,7 +601,7 @@ Location::get_state ()
 	node->set_property ("flags", _flags);
 	node->set_property ("locked", _locked);
 	node->set_property ("position-lock-style", _position_lock_style);
-
+	node->set_property ("timestamp", _timestamp);
 	if (_scene_change) {
 		node->add_child_nocopy (_scene_change->get_state());
 	}
@@ -648,6 +650,8 @@ Location::set_state (const XMLNode& node, int version)
 		return -1;
 	}
 
+	node.get_property ("timestamp", _timestamp);
+
 	Flags old_flags (_flags);
 
 	if (!node.get_property ("flags", _flags)) {