acces this global in the "extended" type

SuperStrict

Type Go
	Global MaxGadgets:Int=256
	Global DrawBack:Int[MaxGadgets]
End Type

Type Sys Extends Go	
	Global DrawIt:Int[Go.MaxGadgets]
	Function test:Int()
		maxgadgets:+1
	End Function
	Global DrawBuffer:Int[MaxGadgets]'<--------
End Type

at the arrow I get an error saying: identifier "Maxgadgets" not found.
Why? Isn't Sys actualy a Go-type?