Index: trunk/src/org/openstreetmap/josm/gui/dialogs/PropertiesMembershipChoiceDialog.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/PropertiesMembershipChoiceDialog.java	(revision 17437)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/PropertiesMembershipChoiceDialog.java	(revision 17438)
@@ -143,5 +143,5 @@
 
     private static boolean isTagged(final Collection<Node> existingNodes) {
-        return existingNodes.stream().anyMatch(Node::hasKeys);
+        return existingNodes.stream().anyMatch(Node::isTagged);
     }