Index: trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 16802)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/UnconnectedWays.java	(revision 16804)
@@ -102,5 +102,5 @@
                     || n.isKeyTrue("noexit")
                     || n.hasKey("entrance", "barrier")
-                    || n.getParentWays().stream().anyMatch(p -> isBuilding(p) || p.hasTag(RAILWAY, "platform"));
+                    || n.getParentWays().stream().anyMatch(p -> isBuilding(p) || p.hasTag(RAILWAY, "platform", "platform_edge"));
         }
     }