Index: applications/editors/josm/plugins/utilsplugin2/src/org/openstreetmap/josm/plugins/utilsplugin2/selection/NodeWayUtils.java
===================================================================
--- applications/editors/josm/plugins/utilsplugin2/src/org/openstreetmap/josm/plugins/utilsplugin2/selection/NodeWayUtils.java	(revision 34812)
+++ applications/editors/josm/plugins/utilsplugin2/src/org/openstreetmap/josm/plugins/utilsplugin2/selection/NodeWayUtils.java	(revision 34814)
@@ -474,5 +474,5 @@
         }
         for (OsmPrimitive p: selected) {
-        	if (!(p instanceof Relation) || p.isMultipolygon())
+        	if (!(p instanceof Relation) || !p.isMultipolygon())
         		continue;
         	addAllInsideMultipolygon(dataset, (Relation) p, newWays, newNodes);