diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index c258dc195..a84242132 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -10,8 +10,8 @@ details. */
    the Cygwin shared library".  This version is used to track important
    changes to the DLL and is mainly informative in nature. */
 
-#define CYGWIN_VERSION_DLL_MAJOR 2008
-#define CYGWIN_VERSION_DLL_MINOR 3
+#define CYGWIN_VERSION_DLL_MAJOR 2009
+#define CYGWIN_VERSION_DLL_MINOR 0
 
 /* Major numbers before CYGWIN_VERSION_DLL_EPOCH are incompatible. */
 
diff --git a/winsup/cygwin/release/2.8.3 b/winsup/cygwin/release/2.9.0
similarity index 93%
rename from winsup/cygwin/release/2.8.3
rename to winsup/cygwin/release/2.9.0
index c76d57115..0fb4a070b 100644
--- a/winsup/cygwin/release/2.8.3
+++ b/winsup/cygwin/release/2.9.0
@@ -1,7 +1,7 @@
 What's new:
 -----------
 
-- New API: explicit_bzero.
+- New APIs: explicit_bzero, pthread_mutex_timedwait.
 
 
 What changed:
diff --git a/winsup/doc/new-features.xml b/winsup/doc/new-features.xml
index 9cd9bfbdf..d7acd9b38 100644
--- a/winsup/doc/new-features.xml
+++ b/winsup/doc/new-features.xml
@@ -4,6 +4,22 @@
 
 <sect1 id="ov-new"><title>What's new and what changed in Cygwin</title>
 
+<sect2 id="ov-new2.9"><title>What's new and what changed in 2.9</title>
+
+<itemizedlist mark="bullet">
+
+<listitem><para>
+New APIs: explicit_bzero, pthread_mutex_timedwait.
+</para></listitem>
+
+<listitem><para>
+Improved implementation of &lt;elf.h&gt;.
+</para></listitem>
+
+</itemizedlist>
+
+</sect2>
+
 <sect2 id="ov-new2.8"><title>What's new and what changed in 2.8</title>
 
 <itemizedlist mark="bullet">
diff --git a/winsup/doc/posix.xml b/winsup/doc/posix.xml
index 5ce5988bc..c9f4f00ec 100644
--- a/winsup/doc/posix.xml
+++ b/winsup/doc/posix.xml
@@ -706,6 +706,7 @@ also IEEE Std 1003.1-2008 (POSIX.1-2008).</para>
     pthread_mutex_init
     pthread_mutex_lock
     pthread_mutex_setprioceiling
+    pthread_mutex_timedlock
     pthread_mutex_trylock
     pthread_mutex_unlock
     pthread_mutexattr_destroy
@@ -1574,7 +1575,6 @@ also IEEE Std 1003.1-2008 (POSIX.1-2008).</para>
     pthread_mutexattr_getrobust
     pthread_mutexattr_setrobust
     pthread_mutex_consistent
-    pthread_mutex_timedlock
     pthread_rwlock_timedrdlock
     pthread_rwlock_timedwrlock
     putmsg