Index: src/org/openstreetmap/josm/gui/dialogs/MapPaintDialog.java
===================================================================
--- src/org/openstreetmap/josm/gui/dialogs/MapPaintDialog.java	(revision 15611)
+++ src/org/openstreetmap/josm/gui/dialogs/MapPaintDialog.java	(working copy)
@@ -184,6 +184,7 @@
     @Override
     public void showNotify() {
         MapPaintStyles.addMapPaintSylesUpdateListener(model);
+        model.mapPaintStylesUpdated();
         MainApplication.getMenu().wireFrameToggleAction.addButtonModel(cbWireframe.getModel());
     }