Index: trunk/src/org/openstreetmap/josm/gui/history/OpenChangesetPopupMenu.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/history/OpenChangesetPopupMenu.java	(revision 12887)
+++ trunk/src/org/openstreetmap/josm/gui/history/OpenChangesetPopupMenu.java	(revision 12888)
@@ -54,5 +54,6 @@
             new ChangesetViewerEntry(tr("View changeset in web browser"), Main.getBaseBrowseUrl() + "/changeset/{0}"),
             new ChangesetViewerEntry(tr("Open {0}", "OSM History Viewer"), "http://osmhv.openstreetmap.de/changeset.jsp?id={0}"),
-            new ChangesetViewerEntry(tr("Open {0}", "achavi (Augmented OSM Change Viewer)"), "https://overpass-api.de/achavi/?changeset={0}")
+            new ChangesetViewerEntry(tr("Open {0}", "achavi (Augmented OSM Change Viewer)"), "https://overpass-api.de/achavi/?changeset={0}"),
+            new ChangesetViewerEntry(tr("Open {0}", "OSMCha (OSM Changeset Analyzer)"), "https://osmcha.mapbox.com/changesets/{0}")
     );