Index: /trunk/src/org/openstreetmap/josm/data/validation/tests/OverlappingWays.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/validation/tests/OverlappingWays.java	(revision 6299)
+++ /trunk/src/org/openstreetmap/josm/data/validation/tests/OverlappingWays.java	(revision 6300)
@@ -80,4 +80,5 @@
                     }
                     if (ws.way.get("landuse") != null
+                            || "riverbank".equals(ws.way.get("waterway"))
                             || ws.way.get("natural") != null
                             || ws.way.get("amenity") != null