Some man pages.
diff --git a/man/man1/plumb.1 b/man/man1/plumb.1
index 0cee82d..c296a1e 100644
--- a/man/man1/plumb.1
+++ b/man/man1/plumb.1
@@ -87,6 +87,6 @@
 .SH SOURCE
 .B /usr/local/plan9/src/cmd/plumb
 .SH "SEE ALSO"
-.IR plumb (2),
+.IR plumb (3),
 .IR plumber (4),
-.IR plumb (6)
+.IR plumb (7)