diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index b99324c..300041d 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -809,7 +809,7 @@
      the given string.
 
    If *line_buffering* is ``True``, :meth:`flush` is implied when a call to
-   write contains a newline character.
+   write contains a newline character or a carriage return.
 
    :class:`TextIOWrapper` provides one attribute in addition to those of
    :class:`TextIOBase` and its parents: