diff --git a/src/Quox/Syntax/Subst.idr b/src/Quox/Syntax/Subst.idr
index 2658e0a..6035633 100644
--- a/src/Quox/Syntax/Subst.idr
+++ b/src/Quox/Syntax/Subst.idr
@@ -90,16 +90,14 @@ drop1 (Shift by) = Shift $ drop1 by
 drop1 (t ::: th) = th
 
 
-||| `prettySubst pr bnd op cl unicode th` pretty-prints the substitution `th`,
+||| `prettySubst pr names bnd op cl th` pretty-prints the substitution `th`,
 ||| with the following arguments:
 |||
 ||| * `th : Subst f from to`
-||| * `pr : (unicode : Bool) -> f to -> m (Doc HL)` prints a single element
+||| * `pr : f to -> m (Doc HL)` prints a single element
 ||| * `names : List Name` is a list of known bound var names
 ||| * `bnd : HL` is the highlight to use for bound variables being subsituted
 ||| * `op, cl : Doc HL` are the opening and closing brackets
-||| * `unicode : Bool` is whether to use unicode characters in the output
-|||   (also passed into `pr`)
 export
 prettySubstM : Pretty.HasEnv m =>
                (pr : f to -> m (Doc HL)) ->