diff --git a/Makefile b/Makefile
index 2d253f1a4..abd83c36f 100644
--- a/Makefile
+++ b/Makefile
@@ -43,6 +43,7 @@ all:
 list:
 .for PLUGIN_DIR in ${PLUGIN_DIRS}
 	@echo ${PLUGIN_DIR} -- $$(${MAKE} -C ${PLUGIN_DIR} -v PLUGIN_COMMENT) \
+	    $$(if [ "$$(${MAKE} -C ${PLUGIN_DIR} -v PLUGIN_MAINTAINER)" = "N/A" ]; then echo "(not maintained)"; fi) \
 	    $$(if [ -n "$$(${MAKE} -C ${PLUGIN_DIR} -v PLUGIN_DEVEL _PLUGIN_DEVEL=)" ]; then echo "(development only)"; fi) \
 	    $$(if [ -n "$$(${MAKE} -C ${PLUGIN_DIR} -v PLUGIN_OBSOLETE)" ]; then echo "(pending removal)"; fi)
 .endfor
diff --git a/Mk/plugins.mk b/Mk/plugins.mk
index 3144a7285..2c89efc64 100644
--- a/Mk/plugins.mk
+++ b/Mk/plugins.mk
@@ -43,12 +43,12 @@ PLUGIN_SCRIPTS=		+PRE_INSTALL +POST_INSTALL \
 			+PRE_DEINSTALL +POST_DEINSTALL
 
 PLUGIN_WWW?=		https://opnsense.org/
+PLUGIN_MAINTAINER?=	N/A
 PLUGIN_LICENSE?=	BSD2CLAUSE
 PLUGIN_TIER?=		3
 PLUGIN_REVISION?=	0
 
-PLUGIN_REQUIRES=	PLUGIN_NAME PLUGIN_VERSION PLUGIN_COMMENT \
-			PLUGIN_MAINTAINER
+PLUGIN_REQUIRES=	PLUGIN_NAME PLUGIN_VERSION PLUGIN_COMMENT
 
 .include "common.mk"
 .include "git.mk"
diff --git a/README.md b/README.md
index 382bb0b85..dfb72caf4 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ net/udpbroadcastrelay -- Control udpbroadcastrelay processes
 net/upnp -- UPnP IGD & PCP/NAT-PMP Service
 net/vnstat -- Network traffic monitor
 net/wol -- Wake on LAN Service
-net/zerotier -- Virtual Networks That Just Work
+net/zerotier -- Virtual Networks That Just Work (not maintained)
 net-mgmt/collectd -- Collect system and application performance metrics periodically
 net-mgmt/lldpd -- LLDP allows you to know exactly on which port is a server
 net-mgmt/net-snmp -- Net-SNMP is a daemon for the SNMP protocol
diff --git a/net/zerotier/Makefile b/net/zerotier/Makefile
index bd40a597b..ae7f99b1e 100644
--- a/net/zerotier/Makefile
+++ b/net/zerotier/Makefile
@@ -3,6 +3,5 @@ PLUGIN_VERSION=		1.3.2
 PLUGIN_REVISION=	6
 PLUGIN_COMMENT=		Virtual Networks That Just Work
 PLUGIN_DEPENDS=		zerotier
-PLUGIN_MAINTAINER=	dharrigan@gmail.com
 
 .include "../../Mk/plugins.mk"