diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index a246e8c..f74b557 100644
--- a/Doc/library/asyncio-eventloop.rst
+++ b/Doc/library/asyncio-eventloop.rst
@@ -294,7 +294,7 @@
 
 .. note::
 
-   On Mac OS X older than Maverick (10.9), :class:`selectors.KqueueSelector`
+   On Mac OS X older than 10.9 (Mavericks), :class:`selectors.KqueueSelector`
    does not support character devices like PTY, whereas it is used by the
    default event loop. The :class:`SelectorEventLoop` can be used with
    :class:`SelectSelector` to handle character devices.