diff --git a/usr.bin/mkdep/mkdep.1 b/usr.bin/mkdep/mkdep.1
index 6ec13c965eba..23df4d7a73a1 100644
--- a/usr.bin/mkdep/mkdep.1
+++ b/usr.bin/mkdep/mkdep.1
@@ -1,4 +1,4 @@
-.\"	$NetBSD: mkdep.1,v 1.11 2003/11/10 17:56:38 dsl Exp $
+.\"	$NetBSD: mkdep.1,v 1.12 2005/10/19 18:19:41 ross Exp $
 .\"
 .\" Copyright (c) 1987, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -98,7 +98,9 @@ Do not print a warning for inaccessible files when
 .Fl d
 is given.
 .It Fl s
-Replace the '.o' suffix of each target filename the suffixes from
+Expand each target filename to a list, replacing the
+.Ql \&.o
+suffix with each element of
 .Ar suffixes .
 The list of suffixes may be space or comma separated.
 .El