diff --git a/Doc/lib/libftplib.tex b/Doc/lib/libftplib.tex
index a89c6a9..c8e6ed3 100644
--- a/Doc/lib/libftplib.tex
+++ b/Doc/lib/libftplib.tex
@@ -1,6 +1,8 @@
 \section{Standard Module \sectcode{ftplib}}
 \label{module-ftplib}
 \stmodindex{ftplib}
+\indexii{FTP}{protocol}
+\index{RFC!959}
 
 \renewcommand{\indexsubitem}{(in module ftplib)}