There is no PyArg_ConvertTuple(); call it by the right name.
This closes SF bug #537511.
diff --git a/Doc/ext/extending.tex b/Doc/ext/extending.tex
index bf63025..716696b 100644
--- a/Doc/ext/extending.tex
+++ b/Doc/ext/extending.tex
@@ -792,7 +792,7 @@
where \var{object} is the Python object to be converted and
\var{address} is the \ctype{void *} argument that was passed to
-\cfunction{PyArg_ConvertTuple()}. The returned \var{status} should be
+\cfunction{PyArg_ParseTuple()}. The returned \var{status} should be
\code{1} for a successful conversion and \code{0} if the conversion
has failed. When the conversion fails, the \var{converter} function
should raise an exception.