Index: trunk/src/org/openstreetmap/josm/data/validation/tests/RelationChecker.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/RelationChecker.java	(revision 18227)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/RelationChecker.java	(revision 18232)
@@ -155,5 +155,5 @@
                     .primitives(n)
                     .build());
-        } else if (allroles.isEmpty()) {
+        } else if (n.hasKey("type") && allroles.isEmpty()) {
             errors.add(TestError.builder(this, Severity.OTHER, RELATION_UNKNOWN)
                     .message(tr("Relation type is unknown"))