Index: /trunk/src/org/openstreetmap/josm/gui/download/OverpassQueryWizardDialog.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/download/OverpassQueryWizardDialog.java	(revision 12903)
+++ /trunk/src/org/openstreetmap/josm/gui/download/OverpassQueryWizardDialog.java	(revision 12904)
@@ -90,5 +90,5 @@
         panel.add(scroll, GBC.eol().fill(GBC.BOTH).anchor(GBC.CENTER));
 
-        List<String> items = OVERPASS_WIZARD_HISTORY.get();
+        List<String> items = new ArrayList<>(OVERPASS_WIZARD_HISTORY.get());
         Collections.reverse(items);
         queryWizard.setPossibleItems(items);