Index: modules/controlwidget/rdial.tcl
--- modules/controlwidget/rdial.tcl.orig
+++ modules/controlwidget/rdial.tcl
@@ -61,7 +61,7 @@
 #    methods get and set
 #
 
-package require Tk 8.5
+package require Tk
 package require snit
 
 namespace eval controlwidget {
