Index: trunk/src/org/openstreetmap/josm/gui/dialogs/HistoryDialog.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/HistoryDialog.java	(revision 362)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/HistoryDialog.java	(revision 363)
@@ -65,5 +65,5 @@
 
 		public int compareTo(HistoryItem o) {
-			return unifyDate(osm.timestamp).compareTo(unifyDate(o.osm.timestamp));
+			return unifyDate(osm.getTimestamp()).compareTo(unifyDate(o.osm.getTimestamp()));
 		}
 	}