diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 62abc276a..6c59deeee 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2008-10-15  Joel Sherrill <joel.sherrill@oarcorp.com>
+
+	* libc/include/sys/unistd.h: Enable ttyname_r() for RTEMS.
+
 2008-10-15  Craig Howland  <howland@LGSInnovations.com>
 
 	* libc/include/ctype.h (isblank):  isblank is C99.
diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index fa7361a25..8a296fe3b 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -166,7 +166,7 @@ long    _EXFUN(sysconf, (int __name ));
 pid_t   _EXFUN(tcgetpgrp, (int __fildes ));
 int     _EXFUN(tcsetpgrp, (int __fildes, pid_t __pgrp_id ));
 char    _EXFUN(*ttyname, (int __fildes ));
-#if defined(__CYGWIN__)
+#if defined(__CYGWIN__) || defined(__rtems__)
 int     _EXFUN(ttyname_r, (int, char *, size_t)); 
 #endif
 int     _EXFUN(unlink, (const char *__path ));