diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst
index 14e00fe..b6622e3 100644
--- a/Doc/library/logging.rst
+++ b/Doc/library/logging.rst
@@ -730,6 +730,9 @@
 | threadName     | ``%(threadName)s``      | Thread name (if available).                   |
 +----------------+-------------------------+-----------------------------------------------+
 
+.. versionchanged:: 3.1
+   *processName* was added.
+
 
 .. _logger-adapter: