#9649: fix default value description.
diff --git a/Doc/library/json.rst b/Doc/library/json.rst
index e1f5cf2..ac097f7 100644
--- a/Doc/library/json.rst
+++ b/Doc/library/json.rst
@@ -339,7 +339,7 @@
encoders and decoders. Otherwise, it will be a :exc:`ValueError` to encode
such floats.
- If *sort_keys* is ``True`` (the default), then the output of dictionaries
+ If *sort_keys* is ``True`` (default ``False``), then the output of dictionaries
will be sorted by key; this is useful for regression tests to ensure that
JSON serializations can be compared on a day-to-day basis.