fix typo in markup
diff --git a/Doc/lib/libcodecs.tex b/Doc/lib/libcodecs.tex
index 125463b..998964b 100644
--- a/Doc/lib/libcodecs.tex
+++ b/Doc/lib/libcodecs.tex
@@ -398,7 +398,7 @@
Decodes data from the stream and returns the resulting object.
\var{chars} indicates the number of characters to read from the
- stream. \function{read()} will never return more than \vars{chars}
+ stream. \function{read()} will never return more than \var{chars}
characters, but it might return less, if there are not enough
characters available.