diff --git a/Doc/api/abstract.tex b/Doc/api/abstract.tex
index f740efb..9c39403 100644
--- a/Doc/api/abstract.tex
+++ b/Doc/api/abstract.tex
@@ -693,12 +693,31 @@
   \samp{float(\var{o})}.\bifuncindex{float}
 \end{cfuncdesc}
 
-\begin{cfuncdesc}{Py_ssize_t}{PyNumber_Index}{PyObject *o}
-  Returns the \var{o} converted to a Py_ssize_t integer on success, or
-  -1 with an exception raised on failure.
+\begin{cfuncdesc}{PyObject*}{PyNumber_Index}{PyObject *o}
+  Returns the \var{o} converted to a Python int or long on success or \NULL{}
+  with a TypeError exception raised on failure.
   \versionadded{2.5}
 \end{cfuncdesc}
 
+\begin{cfuncdesc}{Py_ssize_t}{PyNumber_AsSsize_t}{PyObject *o, PyObject *exc}
+  Returns \var{o} converted to a Py_ssize_t value if \var{o}
+  can be interpreted as an integer. If \var{o} can be converted to a Python
+  int or long but the attempt to convert to a Py_ssize_t value
+  would raise an \exception{OverflowError}, then the \var{exc} argument
+  is the type of exception that will be raised (usually \exception{IndexError}
+  or \exception{OverflowError}).  If \var{exc} is \NULL{}, then the exception
+  is cleared and the value is clipped to \var{PY_SSIZE_T_MIN}
+  for a negative integer or \var{PY_SSIZE_T_MAX} for a positive integer.
+  \versionadded{2.5}
+\end{cfuncdesc}
+
+\begin{cfuncdesc}{int}{PyIndex_Check}{PyObject *o}
+  Returns True if \var{o} is an index integer (has the nb_index slot of 
+  the tp_as_number structure filled in).  
+  \versionadded{2.5}
+\end{cfuncdesc}
+
+
 \section{Sequence Protocol \label{sequence}}
 
 \begin{cfuncdesc}{int}{PySequence_Check}{PyObject *o}