diff --git a/misc/splitvt/Makefile b/misc/splitvt/Makefile
index 983a55266789..9337704e0bc4 100644
--- a/misc/splitvt/Makefile
+++ b/misc/splitvt/Makefile
@@ -14,6 +14,8 @@ MASTER_SITE_SUBDIR=	utils/console
 
 MAINTAINER=	obrien@FreeBSD.org
 
+FORBIDDEN=	"Doesn't change permissions on pty, leaving it mode 666. Making it setuid isn't a solution because there's a buffer overflow."
+
 HAS_CONFIGURE=		yes
 CONFIGURE_SCRIPT=	Configure
 ALL_TARGET=