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diff --git a/nuttx/lib/termios/lib_cfsetspeed.c b/nuttx/lib/termios/lib_cfsetspeed.c
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+++ b/nuttx/lib/termios/lib_cfsetspeed.c
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+/****************************************************************************
+ * lib/termios/lib_cfsetspeed.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <termios.h>
+#include <assert.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: cfsetspeed
+ *
+ * Descripton:
+ *   The cfsetspeed() function is a non-POSIX function that sets the baud
+ *   stored in the structure pointed to by termiosp to speed.
+ *
+ *   There is no effect on the baud set in the hardware until a subsequent
+ *   successful call to tcsetattr() on the same termios structure. 
+ *
+ *   NOTE 1: NuttX does not control input/output baud independently.  Both
+ *   must be the same.  The POSIX standard interfaces, cfisetispeed() and
+ *   cfisetospeed() are defined to be cfsetspeed() in termios.h.
+ *   NOTE 2.  In Nuttx, the speed_t is defined to be uint32_t and the baud
+ *   encodings of termios.h are the actual baud values themselves.  Therefore,
+ *   any baud value can be provided as the speed argument here.  However, if
+ *   you do so, your code will *NOT* be portable to other environments where
+ *   speed_t is smaller and where the termios.h baud values are encoded! To
+ *   avoid portability issues, use the baud definitions in termios.h!
+ *
+ *   Linux, for example, would require this (also non-portable) sequence:
+ *
+ *     cfsetispeed(termiosp, BOTHER);
+ *     termiosp->c_ispeed = baud;
+ *
+ *     cfsetospeed(termiosp, BOTHER);
+ *    termiosp->c_ospeed = baud;
+ *
+ * Input Parameters:
+ *   termiosp - The termiosp argument is a pointer to a termios structure.
+ *   speed - The new input speed
+ *
+ * Returned Value:
+ *   Baud is not checked... OK is always returned (this is non-standard
+ *   behavior). 
+ *
+ ****************************************************************************/
+
+int cfsetspeed(FAR struct termios *termiosp, speed_t speed)
+{
+  FAR speed_t *speedp;
+
+  DEBUGASSERT(termiosp);
+
+  speedp = (FAR speed_t *)&termiosp->c_speed;
+ *speedp = speed;
+
+  return OK;
+}