Fix typo.
diff --git a/Doc/lib/libcodecs.tex b/Doc/lib/libcodecs.tex
index ef4d115..564abbd 100644
--- a/Doc/lib/libcodecs.tex
+++ b/Doc/lib/libcodecs.tex
@@ -940,7 +940,7 @@
 true.
 \end{funcdesc}
 
-\begin{funcdesc}{ToASCCII}{label}
+\begin{funcdesc}{ToASCII}{label}
 Convert a label to \ASCII, as specified in \rfc{3490}.
 \code{UseSTD3ASCIIRules} is assumed to be false.
 \end{funcdesc}