diff --git a/misc/41upgrade/Makefile b/misc/41upgrade/Makefile
new file mode 100644
index 000000000000..0d0c6030cce9
--- /dev/null
+++ b/misc/41upgrade/Makefile
@@ -0,0 +1,36 @@
+# New ports collection makefile for:	4.1R to 4-stable upgrade kit
+# Date created:		25 Aug 2000
+# Whom:			asami
+#
+# $FreeBSD$
+#
+
+PORTNAME=	41upgrade
+PORTVERSION=	2000.08.25
+CATEGORIES=	misc
+DISTFILES=	# empty
+
+MAINTAINER=	asami@FreeBSD.org
+
+.include <bsd.port.pre.mk>
+
+.if !defined(PACKAGE_BUILDING)
+BROKEN=		this \"port\" is for building packages for distribution only, please get the package from http://www.freebsd.org/ports/ if you need an upgrade
+.elif ${OSVERSION} < 410000 || ${OSVERSION} >= 500000
+FORBIDDEN=	this needs to be built on a recent 4-stable system
+.endif
+NO_MTREE=	yes
+PREFIX=		/
+NO_BUILD=	yes
+PKGINSTALL=	${WRKDIR}/INSTALL
+DATE!=		cat /var/db/port.mkversion
+
+do-install:
+	${SED} -e "s/%%VERSION%%/${DATE}/" ${PKGDIR}/INSTALL \
+		> ${PKGINSTALL}
+
+deinstall:
+	@${ECHO} "You can't delete this port."
+	@${FALSE}
+
+.include <bsd.port.post.mk>
diff --git a/misc/41upgrade/pkg-comment b/misc/41upgrade/pkg-comment
new file mode 100644
index 000000000000..abd495e9a42d
--- /dev/null
+++ b/misc/41upgrade/pkg-comment
@@ -0,0 +1 @@
+A convenience package to upgrade your 4.1 system to 4-stable for ports
diff --git a/misc/41upgrade/pkg-descr b/misc/41upgrade/pkg-descr
new file mode 100644
index 000000000000..d9cf2f28873f
--- /dev/null
+++ b/misc/41upgrade/pkg-descr
@@ -0,0 +1,5 @@
+This package will allow you to upgrade your 4.1R system to
+4-stable, so you can compile and use all ports in ports-current.
+
+Satoshi
+asami@freebsd.org
diff --git a/misc/41upgrade/pkg-install b/misc/41upgrade/pkg-install
new file mode 100644
index 000000000000..8ed8de67d62f
--- /dev/null
+++ b/misc/41upgrade/pkg-install
@@ -0,0 +1,5 @@
+#!/bin/sh
+if [ "$2" != "PRE-INSTALL" ]; then
+        exit 0
+fi
+echo %%VERSION%% > /var/db/port.mkversion
diff --git a/misc/41upgrade/pkg-plist b/misc/41upgrade/pkg-plist
new file mode 100644
index 000000000000..d3fa9b81c1c4
--- /dev/null
+++ b/misc/41upgrade/pkg-plist
@@ -0,0 +1 @@
+etc/mtree/BSD.x11-4.dist
diff --git a/misc/41upgrade/pkg-req b/misc/41upgrade/pkg-req
new file mode 100644
index 000000000000..1eb81c651314
--- /dev/null
+++ b/misc/41upgrade/pkg-req
@@ -0,0 +1,5 @@
+#!/bin/sh
+if [ $2 = "DEINSTALL" ]; then
+  echo "Package $1 cannot be removed -- to do so will render your system useless."
+  exit 1
+fi
diff --git a/misc/Makefile b/misc/Makefile
index 56d6ecae3886..cda9cc48da52 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -10,6 +10,7 @@
     SUBDIR += 32upgrade
     SUBDIR += 34upgrade
     SUBDIR += 40upgrade
+    SUBDIR += 41upgrade
     SUBDIR += 44bsd-more
     SUBDIR += Howto
     SUBDIR += aclgen