diff --git a/kuser/kinit.1 b/kuser/kinit.1
index ff919448b..a0e1bcd2f 100644
--- a/kuser/kinit.1
+++ b/kuser/kinit.1
@@ -189,6 +189,11 @@ Request tickets with this particular enctype.
 .Xc
 read the password from the first line of
 .Ar filename .
+If the
+.Ar filename
+is
+.Ar STDIN ,
+the password will be read from the standard input.
 .It Xo
 .Fl -fcache-version= Ns Ar version-number
 .Xc