diff --git a/tools/magrathea/mg.scm b/tools/magrathea/mg.scm
index 0418a94f0..35fdc608b 100644
--- a/tools/magrathea/mg.scm
+++ b/tools/magrathea/mg.scm
@@ -363,7 +363,7 @@ if you meant to pass these arguments to nix, please separate them with
 
 (define (main args)
   (match args
-         [() (print usage)]
+         [(or ("help") ()) (print usage)]
          [("build" . _) (build (cdr args))]
          [("shell" . _) (shell (cdr args))]
          [("path" . _) (path (cdr args))]