Index: trunk/src/org/openstreetmap/josm/io/GeoJSONReader.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/GeoJSONReader.java	(revision 17114)
+++ trunk/src/org/openstreetmap/josm/io/GeoJSONReader.java	(revision 17115)
@@ -254,5 +254,4 @@
             // create multipolygon
             final Relation multipolygon = new Relation();
-            multipolygon.put(TYPE, "multipolygon");
             createWay(coordinates.getJsonArray(0), true)
                 .ifPresent(way -> multipolygon.addMember(new RelationMember("outer", way)));
@@ -264,4 +263,5 @@
 
             fillTagsFromFeature(feature, multipolygon);
+            multipolygon.put(TYPE, "multipolygon");
             getDataSet().addPrimitive(multipolygon);
         }