diff --git a/winsup/doc/ChangeLog b/winsup/doc/ChangeLog
index a705415b5..3fae36511 100644
--- a/winsup/doc/ChangeLog
+++ b/winsup/doc/ChangeLog
@@ -1,3 +1,9 @@
+2012-05-06  Christopher Faylor  <me.cygwin2012@cgf.cx>
+
+	* cygwinenv.sgml: Add pipe_byte description.
+	* new-features.sgml (ov-new1.7.15): Add new pipe_byte description for
+	1.7.15.
+
 2012-04-25  Corinna Vinschen  <corinna@vinschen.de>
 
 	* new-features.sgml (ov-new1.7.14): Add mouse reporting mode 1005.
diff --git a/winsup/doc/cygwinenv.sgml b/winsup/doc/cygwinenv.sgml
index 2be87c8b2..3a05e9ba3 100644
--- a/winsup/doc/cygwinenv.sgml
+++ b/winsup/doc/cygwinenv.sgml
@@ -58,6 +58,11 @@ Default is set.</para>
 If supplied, wildcard matching is case insensitive.  The default is <literal>noignorecase</literal></para>
 </listitem>
 
+<listitem>
+<para><envar>(no)pipe_byte</envar> - causes Cygwin to open pipes in byte mode rather than
+message mode.</para>
+</listitem>
+
 <listitem>
 <para><envar>proc_retry:n</envar> - causes <function>fork()</function> and
 <function>exec*()</function> to retry n times when a child process fails
diff --git a/winsup/doc/new-features.sgml b/winsup/doc/new-features.sgml
index 403d2709e..5562e53ce 100644
--- a/winsup/doc/new-features.sgml
+++ b/winsup/doc/new-features.sgml
@@ -1,5 +1,13 @@
 <sect1 id="ov-new1.7"><title>What's new and what changed in Cygwin 1.7</title>
 
+<sect2 id="ov-new1.7.14"><title>What's new and what changed from 1.7.14 to 1.7.15</title>
+<itemizedlist mark="bullet">
+
+<listitem><para>
+CYGWIN=pipe_byte option now forces the opening of pipes in byte mode rather than message mode.
+</para></listitem>
+</sect2>
+
 <sect2 id="ov-new1.7.14"><title>What's new and what changed from 1.7.13 to 1.7.14</title>
 
 <itemizedlist mark="bullet">