Index: Makefile
===================================================================
--- Makefile	(revision 552122)
+++ Makefile	(working copy)
@@ -10,6 +10,9 @@
 MAINTAINER=	udo@schweigert-muc.de
 COMMENT=	TCP/IP traffic logging tool
 
+DEPRECATED=	Unmaintained and dead upstream. Does not build with modern compilers.
+EXPIRATION_DATE=2021-04-12
+
 USES=		gmake
 GNU_CONFIGURE=	yes
 CPPFLAGS+=	-I${LOCALBASE}/include