Index: doc/coreutils.texi
===================================================================
--- doc/coreutils.texi.orig	2012-04-16 13:12:04.624344318 +0200
+++ doc/coreutils.texi	2012-04-16 13:13:08.231837183 +0200
@@ -12447,6 +12447,16 @@ This section describes commands that man
 @command{basename} removes any leading directory components from
 @var{name}.  Synopsis:
 
+@table @samp
+
+@item -z
+@itemx --zero
+@opindex -z
+@opindex --zero
+Separate output items with @sc{nul} characters.
+
+@end table
+
 @example
 basename @var{name} [@var{suffix}]
 basename @var{option}... @var{name}...