Index: applications/editors/josm/plugins/reltoolbox/src/relcontext/RelContextDialog.java
===================================================================
--- applications/editors/josm/plugins/reltoolbox/src/relcontext/RelContextDialog.java	(revision 27927)
+++ applications/editors/josm/plugins/reltoolbox/src/relcontext/RelContextDialog.java	(revision 28290)
@@ -563,5 +563,5 @@
 
         public EnterRoleAction() {
-            super(tr("Change role"), null, tr("Enter role for selected members"),
+            super(tr("Change role"), (String)null, tr("Enter role for selected members"),
                     Shortcut.registerShortcut("reltoolbox:changerole", tr("Relation Toolbox: {0}", tr("Enter role for selected members")),
                     KeyEvent.VK_R, Shortcut.ALT_CTRL), false, "relcontext/enterrole", true);