diff --git a/Doc/library/time.rst b/Doc/library/time.rst
index 0ffce47..8c6813b 100644
--- a/Doc/library/time.rst
+++ b/Doc/library/time.rst
@@ -772,7 +772,7 @@
    Similar to :data:`CLOCK_MONOTONIC`, but provides access to a raw
    hardware-based time that is not subject to NTP adjustments.
 
-   Availability: Linux 2.6.28 or later.
+   .. availability:: Linux 2.6.28 and newer, macOS 10.12 and newer.
 
    .. versionadded:: 3.3
 
@@ -799,7 +799,7 @@
 
    Thread-specific CPU-time clock.
 
-   Availability: Unix.
+   .. availability::  Unix.
 
    .. versionadded:: 3.3