diff --git a/share/man/man4/sb.4 b/share/man/man4/sb.4
index ef78e0e77e7c..9d06c03fffd4 100644
--- a/share/man/man4/sb.4
+++ b/share/man/man4/sb.4
@@ -1,4 +1,4 @@
-.\"	$NetBSD: sb.4,v 1.25 2008/04/30 13:10:54 martin Exp $
+.\"	$NetBSD: sb.4,v 1.26 2019/08/05 15:06:47 ryoon Exp $
 .\"
 .\" Copyright (c) 1996 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -92,7 +92,7 @@ has a midi device attached directly to the
 .Xr midi 4 ,
 .Xr mpu 4 ,
 .Xr opl 4 ,
-.Xr pnpbios 4
+.Xr i386/pnpbios 4
 .Sh HISTORY
 The
 .Nm