PyMapping_SetItemString() returns int, not an object.
diff --git a/Doc/api/api.tex b/Doc/api/api.tex
index 93e061c..48da118 100644
--- a/Doc/api/api.tex
+++ b/Doc/api/api.tex
@@ -1596,7 +1596,7 @@
\samp{\var{o}[\var{key}]}.
\end{cfuncdesc}
-\begin{cfuncdesc}{PyObject*}{PyMapping_SetItemString}{PyObject *o, char *key, PyObject *v}
+\begin{cfuncdesc}{int}{PyMapping_SetItemString}{PyObject *o, char *key, PyObject *v}
Map the object \var{key} to the value \var{v} in object \var{o}.
Returns \code{-1} on failure. This is the equivalent of the Python
statement \samp{\var{o}[\var{key}] = \var{v}}.