Index: trunk/data/validator/geometry.mapcss
===================================================================
--- trunk/data/validator/geometry.mapcss	(revision 14576)
+++ trunk/data/validator/geometry.mapcss	(revision 14577)
@@ -58,4 +58,5 @@
 node[golf=fairway],
 node[area=yes],
+node[area:highway],
 node[landuse],
 node[natural=scree],
Index: trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java	(revision 14576)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java	(revision 14577)
@@ -153,4 +153,5 @@
                 new HashSet<>(Arrays.asList("riverbank")), false),
         new UnclosedWaysCheck(1109, "boundary", marktr("boundary type {0}")),
+        new UnclosedWaysCheck(1110, "area:highway", marktr("area:highway type {0}")),
         new UnclosedWaysBooleanCheck(1120, "building", marktr("building")),
         new UnclosedWaysBooleanCheck(1130, "area",     marktr("area")),