diff --git a/sys/man/8/boot b/sys/man/8/boot
index eb995e397..925dab60b 100644
--- a/sys/man/8/boot
+++ b/sys/man/8/boot
@@ -122,7 +122,10 @@ terminal or a CPU server.
 A terminal must have a
 .I username
 set.
-If none is specified with the
+If not specified with the
+.B user=
+.IR plan9.ini (8)
+parameter or the
 .B -u
 option,
 .I boot