diff --git a/Doc/library/time.rst b/Doc/library/time.rst
index 0ffce47..892ed13 100644
--- a/Doc/library/time.rst
+++ b/Doc/library/time.rst
@@ -815,9 +815,21 @@
    .. versionadded:: 3.7
 
 
+.. data:: CLOCK_UPTIME_RAW
+
+   Clock that increments monotonically, tracking the time since an arbitrary
+   point, unaffected by frequency or time adjustments and not incremented while
+   the system is asleep.
+
+   .. availability:: macOS 10.12 and newer.
+
+   .. versionadded:: 3.8
+
+
 The following constant is the only parameter that can be sent to
 :func:`clock_settime`.
 
+
 .. data:: CLOCK_REALTIME
 
    System-wide real-time clock.  Setting this clock requires appropriate