diff --git a/winsup/doc/ChangeLog b/winsup/doc/ChangeLog
index 9be4bc12a..ef76e39fd 100644
--- a/winsup/doc/ChangeLog
+++ b/winsup/doc/ChangeLog
@@ -1,3 +1,7 @@
+2010-09-11  Dave Korn  <dave.korn.cygwin@gmail.com>
+
+	* new-features.sgml: Mention fenv support.
+
 2010-09-06  Corinna Vinschen  <corinna@vinschen.de>
 
 	* new-features.sgml (ov-new1.7.8): Document /proc/sys.
diff --git a/winsup/doc/new-features.sgml b/winsup/doc/new-features.sgml
index 7bff2087b..3dd0ac89a 100644
--- a/winsup/doc/new-features.sgml
+++ b/winsup/doc/new-features.sgml
@@ -4,6 +4,17 @@
 
 <itemizedlist mark="bullet">
 
+<listitem><para>
+Cygwin now ships the C standard library fenv.h header file, and implements the
+related APIs (including GNU/glibc extensions): feclearexcept, fedisableexcept,
+feenableexcept, fegetenv, fegetexcept, fegetexceptflag, fegetprec, fegetround,
+feholdexcept, feraiseexcept, fesetenv, fesetexceptflag, fesetprec, fesetround,
+fetestexcept, feupdateenv, and predefines both default and no-mask FP
+environments.  See the
+<ulink url="http://www.gnu.org/software/libc/manual/html_node/Arithmetic.html">
+GNU C Library manual</ulink> for full details of this functionality.
+</para></listitem>
+
 <listitem><para>
 /proc/sys allows to access the native NT namespace.
 </para></listitem>