diff --git a/net/wireguard-kmod/Makefile b/net/wireguard-kmod/Makefile
index c88b72f4729b..4ae494f3dbf6 100644
--- a/net/wireguard-kmod/Makefile
+++ b/net/wireguard-kmod/Makefile
@@ -1,21 +1,22 @@
 PORTNAME=	wireguard-kmod
 PORTVERSION=	0.0.20210606
+PORTREVISION=	1
 CATEGORIES=	net net-vpn
 MASTER_SITES=	https://git.zx2c4.com/wireguard-freebsd/snapshot/
 DISTNAME=	wireguard-freebsd-${PORTVERSION}
 
 MAINTAINER=	decke@FreeBSD.org
 COMMENT=	WireGuard implementation for the FreeBSD kernel
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/../COPYING
 
 IGNORE_FreeBSD_11=	only for FreeBSD 12.1 and newer
 
 USES=		kmod tar:xz uidfix
 
 WRKSRC_SUBDIR=	src
 
 PLIST_FILES=	${KMODDIR}/if_wg.ko
 
 .include <bsd.port.mk>
diff --git a/net/wireguard-kmod/files/patch-compat.h b/net/wireguard-kmod/files/patch-compat.h
new file mode 100644
index 000000000000..b1dd32249515
--- /dev/null
+++ b/net/wireguard-kmod/files/patch-compat.h
@@ -0,0 +1,22 @@
+From 64a507ad6b3c7e8455c67b452160b9e4211fd872 Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason@zx2c4.com>
+Date: Mon, 7 Jun 2021 11:50:20 +0200
+Subject: compat: taskqueue draining was backported to stable/13
+
+Since 407b687dfef ("Make sure all tasklets are drained before unloading
+the LinuxKPI. Else use-after-free may happen."), stable/13 now has the
+taskqueue API that we need.
+
+Reported-by: Herbert J. Skuhra <herbert@gojira.at>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+--- compat.h.orig	2021-06-06 13:35:25 UTC
++++ compat.h
+@@ -8,7 +8,7 @@
+ 
+ #include <sys/param.h>
+ 
+-#if __FreeBSD_version < 1400000
++#if __FreeBSD_version < 1300507
+ #include <sys/smp.h>
+ #include <sys/gtaskqueue.h>
+