diff --git a/Doc/api/api.tex b/Doc/api/api.tex
index 31ba95e..367cb06 100644
--- a/Doc/api/api.tex
+++ b/Doc/api/api.tex
@@ -1419,6 +1419,13 @@
 \var{o}[\var{key}]}.
 \end{cfuncdesc}
 
+\begin{cfuncdesc}{int}{PyObject_AsFileDescriptor}{PyObject *o}
+Derives a file-descriptor from a Python object.  If the object
+is an integer or long integer, its value is returned.  If not, the
+object's \method{fileno()} method is called if it exists; the method
+must return an integer or long integer, which is returned as the file
+descriptor value.  Returns \code{-1} on failure.
+\end{cfuncdesc}
 
 \section{Number Protocol \label{number}}
 
diff --git a/Doc/api/refcounts.dat b/Doc/api/refcounts.dat
index be46518..c31d3b3 100644
--- a/Doc/api/refcounts.dat
+++ b/Doc/api/refcounts.dat
@@ -539,6 +539,9 @@
 PyOS_GetLastModificationTime:long:::
 PyOS_GetLastModificationTime:char*:filename::
 
+PyObject_AsFileDescriptor:int::: 
+PyObject_AsFileDescriptor:PyObject*:o:0:
+
 PyObject_CallFunction:PyObject*::+1:
 PyObject_CallFunction:PyObject*:callable_object:0:
 PyObject_CallFunction:char*:format::