diff --git a/docs/topics/extensions.rst b/docs/topics/extensions.rst
index ae94c55a4..e280224b1 100644
--- a/docs/topics/extensions.rst
+++ b/docs/topics/extensions.rst
@@ -481,6 +481,6 @@ Default: ``None``
 PERIODIC_LOG_TIMING_ENABLED
 """""""""""""""""""""""""""
 
-Default: ``None``
+Default: ``False``
 
-``"PERIODIC_LOG_TIMING_ENABLED": True`` - enables logging of timing data
\ No newline at end of file
+``True`` enables logging of timing data (i.e. the ``"time"`` section).
\ No newline at end of file