diff --git a/gtk2_ardour/region_view.cc b/gtk2_ardour/region_view.cc
index 434408d563..b7828de9b3 100644
--- a/gtk2_ardour/region_view.cc
+++ b/gtk2_ardour/region_view.cc
@@ -501,7 +501,7 @@ RegionView::reset_width_dependent_items (double pixel_width)
 	_pixel_width = pixel_width;
 
 	if (_xrun_markers_visible) {
-		const samplepos_t start = _region->start();
+		const samplepos_t start = _region->start_sample();
 		for (list<std::pair<samplepos_t, ArdourCanvas::Arrow*> >::iterator i = _xrun_markers.begin(); i != _xrun_markers.end(); ++i) {
 			float x_pos = trackview.editor().sample_to_pixel (i->first - start);
 			i->second->set_x (x_pos);
@@ -517,8 +517,8 @@ RegionView::update_xrun_markers ()
 		return;
 	}
 
-	const samplepos_t start = _region->start();
-	const samplepos_t length = _region->length();
+	const samplepos_t start = _region->start_sample();
+	const samplepos_t length = _region->length_samples();
 	for (list<std::pair<samplepos_t, ArdourCanvas::Arrow*> >::iterator i = _xrun_markers.begin(); i != _xrun_markers.end(); ++i) {
 		float x_pos = trackview.editor().sample_to_pixel (i->first - start);
 		i->second->set_x (x_pos);
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index d8a32f8013..93d410f002 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -1826,11 +1826,13 @@ Region::captured_xruns (XrunPositions& xruns, bool abs) const
 	bool was_empty = xruns.empty ();
 	for (SourceList::const_iterator i = _sources.begin (); i != _sources.end(); ++i) {
 		XrunPositions const& x = (*i)->captured_xruns ();
+		const samplepos_t ss = start_sample();
+		const samplecnt_t ll = length_samples();
 		for (XrunPositions::const_iterator p = x.begin (); p != x.end (); ++p) {
 			if (abs) {
 				xruns.push_back (*p);
-			} else if (*p >= _start && *p < _start + _length) {
-				xruns.push_back (*p - _start);
+			} else if (*p >= ss && *p < ss + ll) {
+				xruns.push_back (*p - ss);
 			}
 		}
 	}