Don't know if this is the best way to do it, but this way (see attached patch) it works for me.
Regards, Juergen
diff --git debian/watch debian/watch index 331129d..4a7e288 100644 --- debian/watch +++ debian/watch @@ -3,5 +3,6 @@ # to check for upstream updates and more. # Site Directory Pattern Version Script version=2 -http://prdownloads.sourceforge.net/adc-archmbox/archmbox-(.*)\.tar\.gz debian uupdate +http://sourceforge.net/project/showfiles.php?group_id=65776&package_id=63642 \ +(?:http://downloads.sourceforge.net/adc-archmbox/archmbox-([0-9\.]+)\.tar\.gz)?\?.* debian uupdate
