Fix wrong function name. Noticed by Clive Darke.
diff --git a/Doc/c-api/init.rst b/Doc/c-api/init.rst
index a4e4ad9..27408a4 100644
--- a/Doc/c-api/init.rst
+++ b/Doc/c-api/init.rst
@@ -474,7 +474,7 @@
:ref:`lock-objects` in the child. When extending or embedding Python, there
is no way to inform Python of additional (non-Python) locks that need to be
acquired before or reset after a fork. OS facilities such as
-:cfunc:`posix_atfork` would need to be used to accomplish the same thing.
+:cfunc:`pthread_atfork` would need to be used to accomplish the same thing.
Additionally, when extending or embedding Python, calling :cfunc:`fork`
directly rather than through :func:`os.fork` (and returning to or calling
into Python) may result in a deadlock by one of Python's internal locks