Index: /applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/tests/OverlappingWays.java
===================================================================
--- /applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/tests/OverlappingWays.java	(revision 10063)
+++ /applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/tests/OverlappingWays.java	(revision 10064)
@@ -79,5 +79,6 @@
 						area++;
 					if (ws.way.get("landuse") != null || ws.way.get("natural") != null
-					|| ws.way.get("amenity") != null || ws.way.get("leisure") != null)
+					|| ws.way.get("amenity") != null || ws.way.get("leisure") != null
+					|| ws.way.get("building") != null)
 					{
 						area++; ways--;