Index: modules/map/mark.tcl
--- modules/map/mark.tcl.orig
+++ modules/map/mark.tcl
@@ -37,7 +37,7 @@ package provide map::mark 0.1
 # # ## ### ##### ######## ############# ######################
 ## Requirements
 
-package require Tcl 8.6
+package require Tcl 8.6-
 #                                      ;# Tcllib
 package require debug		       ;# - Narrative Tracing
 package require debug::caller          ;#
