Give correct length of string.
diff --git a/Doc/lib/libmd5.tex b/Doc/lib/libmd5.tex
index bd26f02..773f93c 100644
--- a/Doc/lib/libmd5.tex
+++ b/Doc/lib/libmd5.tex
@@ -53,7 +53,7 @@
 
 \begin{funcdesc}{digest}{}
 Return the digest of the strings passed to the \code{update()}
-method so far.  This is an 8-byte string which may contain
+method so far.  This is an 16-byte string which may contain
 non-\ASCII{} characters, including null bytes.
 \end{funcdesc}