diff --git a/bin/ps/ps.1 b/bin/ps/ps.1
index 68decc45b6a6..1b3cd7e8f8be 100644
--- a/bin/ps/ps.1
+++ b/bin/ps/ps.1
@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)ps.1	8.3 (Berkeley) 4/18/94
-.\"	$Id: ps.1,v 1.13 1997/02/22 14:05:07 peter Exp $
+.\"	$Id: ps.1,v 1.14 1997/08/19 21:52:07 jlemon Exp $
 .\"
 .Dd April 18, 1994
 .Dt PS 1
@@ -88,6 +88,8 @@ cpu calculation that ignores ``resident'' time (this normally has
 no effect).
 .It Fl e
 Display the environment as well.
+.It Fl f
+Work harder to get detailed process information.
 .It Fl h
 Repeat the information header as often as necessary to guarantee one
 header per page of information.