$NetBSD$

--- doc/Makefile.orig	1999-07-28 22:42:21.000000000 +0200
+++ doc/Makefile
@@ -6,7 +6,7 @@
 
 MAKE = make
 SHELL = /bin/sh
-ROFF = psroff -t
+ROFF = groff -Tps
 
 D = ../ps
 
