Index: /trunk/src/org/openstreetmap/josm/data/validation/tests/LongSegment.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/validation/tests/LongSegment.java	(revision 17381)
+++ /trunk/src/org/openstreetmap/josm/data/validation/tests/LongSegment.java	(revision 17382)
@@ -87,5 +87,6 @@
 
     private boolean ignoreWay(Way w) {
-        return visitedWays.contains(w) || w.hasTag("route", "ferry") || w.hasTag("bay", "fjord") || w.hasTag("natural", "strait");
+        return w.hasKey("boundary") || w.hasTag("route", "ferry") || w.hasTag("bay", "fjord")
+                || w.hasTag("natural", "strait") || visitedWays.contains(w);
     }