diff --git a/Doc/lib/libwww.tex b/Doc/lib/libwww.tex
index 5e698e42e90..1a92fdf2e6e 100644
--- a/Doc/lib/libwww.tex
+++ b/Doc/lib/libwww.tex
@@ -78,6 +78,9 @@ written by Sun Microsystems, Inc. June 1987.
 \item[mailcap]
 --- Mailcap file handling.  See \rfc{1524}.
 
+\item[mimetypes]
+--- Mapping of filename extensions to MIME types.
+
 \item[base64]
 --- Encode/decode binary files using the MIME base64 encoding.