# Spacing (numwidth) control for listtheorems

I am using the \listtheorems command from ntheorem to generate a list of theorems for a document. However, because I number the theorems inside sections, the theorem number is a bit on the long side, and when typeset the theorem numbers run into the theorem name.

I know that for lists of figures or the TOC I can control this using tocloft and setting numwidth, is there something similar I can do for the theorem lists generated by ntheorem?

MWE:

\documentclass{book}
\usepackage{amsmath}
\usepackage[standard,amsmath]{ntheorem}
\setcounter{chapter}{11}
\setcounter{section}{22}
\setcounter{Theorem}{33}
\numberwithin{Theorem}{section}

\begin{document}
\begin{Theorem}[False Theorem]
This is not a theorem
\end{Theorem}

List of theorems:
\listtheorems{Theorem}
\end{document}

The output looks like:

Here's the tail end of the log from latex building the MWE:

** Generating table of Theorem
(./listthm.thm
Overfull \hbox (12.5556pt too wide) detected at line 1
\OT1/cmr/m/n/10 11.22.34
[]

)
\tf@thm=\write3
\openout3 = `listthm.thm'.

[1

] (./listthm.aux) )
-
A MWE is needed. – egreg Feb 2 '12 at 11:39