Index: applications/editors/josm/plugins/poly/src/poly/PolyExporter.java
===================================================================
--- applications/editors/josm/plugins/poly/src/poly/PolyExporter.java	(revision 33570)
+++ applications/editors/josm/plugins/poly/src/poly/PolyExporter.java	(revision 34098)
@@ -39,5 +39,5 @@
         if (layer instanceof OsmDataLayer) {
             try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF8"))) {
-                DataSet ds = ((OsmDataLayer) layer).data;
+                DataSet ds = ((OsmDataLayer) layer).getDataSet();
                 Map<Way, Boolean> ways = new TreeMap<>();
                 String polygonName = file.getName();
Index: applications/editors/josm/plugins/poly/src/poly/PolyImporter.java
===================================================================
--- applications/editors/josm/plugins/poly/src/poly/PolyImporter.java	(revision 33570)
+++ applications/editors/josm/plugins/poly/src/poly/PolyImporter.java	(revision 34098)
@@ -20,5 +20,5 @@
 import org.openstreetmap.josm.data.osm.RelationMember;
 import org.openstreetmap.josm.data.osm.Way;
-import org.openstreetmap.josm.data.osm.DataSet.UploadPolicy;
+import org.openstreetmap.josm.data.osm.UploadPolicy;
 import org.openstreetmap.josm.gui.io.importexport.OsmImporter;
 import org.openstreetmap.josm.gui.progress.NullProgressMonitor;