Index: /trunk/src/org/openstreetmap/josm/io/OsmApi.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/io/OsmApi.java	(revision 1577)
+++ /trunk/src/org/openstreetmap/josm/io/OsmApi.java	(revision 1578)
@@ -164,4 +164,5 @@
         swriter.getBuffer().setLength(0);
         osmWriter.setWithBody(addBody);
+        osmWriter.setChangeset(changeset);
         osmWriter.header();
         o.visit(osmWriter);