diff --git a/man/zip_open.mdoc b/man/zip_open.mdoc
index 3fb7414..79c0cda 100644
--- a/man/zip_open.mdoc
+++ b/man/zip_open.mdoc
@@ -1,4 +1,4 @@
-.\" $NiH$
+.\" $NiH: zip_open.mdoc,v 1.1 2003/10/01 18:28:10 dillo Exp $
 .\" zip_open.c -- open zip file
 .\" Copyright (C) 1999, 2003 Dieter Baron and Thomas Klausner
 .\"
@@ -18,10 +18,23 @@
 .Ft struct zip *
 .Fn zip_open "const char *path" "int flags"
 .Sh DESCRIPTION
-.\" XXX
+The
+.Fa flags
+are specified by
+.Em or Ns 'ing
+the following values, or 0 for none of them.
+.Bl -tag -offset indent -width ZIP_CHECKCONS
+.It Dv ZIP_CREATE
+Create the archive if it does not exist.
+.It Dv ZIP_EXCL
+Error if archive already exists.
+.It Dv ZIP_CHECKCONS
+Perform additional consistency checks on the archive, and error if
+they fail.
+.El
 .Sh RETURN VALUES
 Upon successful completion
-.Fn fopen
+.Fn zip_open
 returns a
 .Tn struct zip
 pointer.