atol supports trailing l/L if base is 0
diff --git a/Doc/lib/libstring.tex b/Doc/lib/libstring.tex
index ac6dc55..2e79d43 100644
--- a/Doc/lib/libstring.tex
+++ b/Doc/lib/libstring.tex
@@ -79,7 +79,7 @@
string must consist of one or more digits, optionally preceded by a
sign (\samp{+} or \samp{-}). The \var{base} argument has the same
meaning as for \code{atoi()}. A trailing \samp{l} or \samp{L} is not
-allowed.
+allowed, except if the base is 0.
\end{funcdesc}
\begin{funcdesc}{expandtabs}{s\, tabsize}