[Haskell-cafe] Recursive modules, GHC /= Report?

Hi, Here: http://www.haskell.org/onlinereport/modules.html I read: "Modules may reference other modules via explicit import declarations, each giving the name of a module to be imported and specifying its entities to be imported. Modules may be mutually recursive." However, I get this from GHC: --- Module imports form a cycle for modules: main:Main imports: Control.Concurrent.MVar GtkMostrarConfig GtkLerECG Graphics.UI.Gtk main:GtkMostrarConfig imports: Control.Concurrent.MVar Graphics.UI.Gtk Main --- Aren't cycles of modules just recursive modules? Why wasn't that allowed? Thanks, Maurício