Index: trunk/src/org/openstreetmap/josm/actions/CombineWayAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/CombineWayAction.java	(revision 3508)
+++ trunk/src/org/openstreetmap/josm/actions/CombineWayAction.java	(revision 3510)
@@ -116,4 +116,5 @@
             return null;
         }
+        Main.main.undoRedo.add(combineResult.b);
         return combineResult.a;
     }