Index: applications/editors/josm/plugins/undelete/src/org/openstreetmap/josm/plugins/undelete/UndeleteDialog.java
===================================================================
--- applications/editors/josm/plugins/undelete/src/org/openstreetmap/josm/plugins/undelete/UndeleteDialog.java	(revision 35474)
+++ applications/editors/josm/plugins/undelete/src/org/openstreetmap/josm/plugins/undelete/UndeleteDialog.java	(revision 35499)
@@ -56,5 +56,5 @@
         all.add(layer, gc);
         setContent(all, false);
-        setButtonIcons("undelete.png", "cancel.png");
+        setButtonIcons("undelete", "cancel");
         setToolTipTexts(tr("Start undeleting"), tr("Close dialog and cancel"));
         setDefaultButton(1);