diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 005ff984a..222b8a8fd 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,8 @@
+2009-07-06  Joel Sherrill <joel.sherrill@oarcorp.com>
+
+	* libc/include/sys/features.h: Enable UNIX98 mutex attributes
+	for RTEMS. 
+
 2009-07-03  Eric Blake  <ebb9@byu.net>
 
 	Add mkdtemp, mkstemps.
diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
index 1fa542789..bc40f0068 100644
--- a/newlib/libc/include/sys/features.h
+++ b/newlib/libc/include/sys/features.h
@@ -73,6 +73,9 @@ extern "C" {
 #define _POSIX_INTERRUPT_CONTROL		1
 #define _POSIX_ADVISORY_INFO			1
 
+/* UNIX98 added some new pthread mutex attributes */
+#define _UNIX98_THREAD_MUTEX_ATTRIBUTES         1
+
 #endif
 
 /* XMK loosely adheres to POSIX -- 1003.1 */