diff --git a/libs/ardour/source.cc b/libs/ardour/source.cc
index 6da714db60..1490a0e244 100644
--- a/libs/ardour/source.cc
+++ b/libs/ardour/source.cc
@@ -142,6 +142,13 @@ Source::get_state ()
 		node->add_child_nocopy (get_cue_state());
 	}
 
+	if (!segment_descriptors.empty()) {
+		XMLNode* sd_node = new XMLNode (X_("SegmentDescriptors"));
+		for (auto const & sd : segment_descriptors) {
+			sd_node->add_child_nocopy (sd.get_state());
+		}
+	}
+
 	return *node;
 }