diff --git a/lib/libc/sys/execve.2 b/lib/libc/sys/execve.2
index c7861f15a314..393d9a7d140a 100644
--- a/lib/libc/sys/execve.2
+++ b/lib/libc/sys/execve.2
@@ -1,4 +1,4 @@
-.\"	$NetBSD: execve.2,v 1.18 2000/06/17 19:33:34 hubertf Exp $
+.\"	$NetBSD: execve.2,v 1.19 2000/07/05 12:42:09 he Exp $
 .\"
 .\" Copyright (c) 1980, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -93,6 +93,9 @@ become the subsequent arguments.  The zeroth argument, normally the name of the
 .\" was .Fn execve Ap d
 \fBexecve\fP'd
 file, is left unchanged.
+The interpreter named by
+.Em interpreter
+must not itself be an interpreter file.
 .Pp
 The argument
 .Fa argv