Closes #22748: there are no PyString C functions in 3.x.
diff --git a/Doc/howto/cporting.rst b/Doc/howto/cporting.rst
index 1ad77d6..6ebcc41 100644
--- a/Doc/howto/cporting.rst
+++ b/Doc/howto/cporting.rst
@@ -43,10 +43,9 @@
str/unicode Unification
-----------------------
-
-Python 3's :func:`str` (``PyString_*`` functions in C) type is equivalent to
-Python 2's :func:`unicode` (``PyUnicode_*``). The old 8-bit string type has
-become :func:`bytes`. Python 2.6 and later provide a compatibility header,
+Python 3's :func:`str` type is equivalent to Python 2's :func:`unicode`; the C
+functions are called ``PyUnicode_*`` for both. The old 8-bit string type has become
+:func:`bytes`, with C functions called ``PyBytes_*``. Python 2.6 and later provide a compatibility header,
:file:`bytesobject.h`, mapping ``PyBytes`` names to ``PyString`` ones. For best
compatibility with Python 3, :c:type:`PyUnicode` should be used for textual data and
:c:type:`PyBytes` for binary data. It's also important to remember that