Index: applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignInputDialog.java
===================================================================
--- applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignInputDialog.java	(revision 35260)
+++ applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignInputDialog.java	(revision 35499)
@@ -117,5 +117,5 @@
         this.signs = RoadSignsPlugin.signs;
         sel = new SignSelection();
-        setButtonIcons("ok.png", "cancel.png");
+        setButtonIcons("ok", "cancel");
         final JTabbedPane tabs = new JTabbedPane();
         tabs.add(tr("signs"), buildSignsPanel());