diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index 0bd325a..b0b898d 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -438,9 +438,6 @@
       the number actually written. Only one system call is made, so it
       is possible that only some of the data is written.
 
-   Note that the inherited ``readinto()`` method should not be used on
-   :class:`FileIO` objects.
-
 
 Buffered Streams
 ----------------
diff --git a/Modules/_fileio.c b/Modules/_fileio.c
index 4b382fb..fd35d69 100644
--- a/Modules/_fileio.c
+++ b/Modules/_fileio.c
@@ -887,7 +887,7 @@
 "tell() -> int.	 Current file position");
 
 PyDoc_STRVAR(readinto_doc,
-"readinto() -> Undocumented.  Don't use this; it may go away.");
+"readinto() -> Same as RawIOBase.readinto().");
 
 PyDoc_STRVAR(close_doc,
 "close() -> None.  Close the file.\n"