diff --git a/luci-app-mlvpn/htdocs/luci-static/resources/view/services/mlvpn.js b/luci-app-mlvpn/htdocs/luci-static/resources/view/services/mlvpn.js
index e7259c44a..f8bbc58c5 100644
--- a/luci-app-mlvpn/htdocs/luci-static/resources/view/services/mlvpn.js
+++ b/luci-app-mlvpn/htdocs/luci-static/resources/view/services/mlvpn.js
@@ -82,6 +82,12 @@ return L.view.extend({
 		o.rmempty   = false;
 		o.modalonly = true;
 
+		o = s.taboption('advanced', form.Value, 'latency_tolerance', _('Latency tolerance'));
+		o.default   = '300';
+		o.datatype  = "uinteger";
+		o.rmempty   = false;
+		o.modalonly = true;
+
 		return m.render();
 	}
 });
diff --git a/mlvpn/Makefile b/mlvpn/Makefile
index f9a356f02..1dbe8573b 100644
--- a/mlvpn/Makefile
+++ b/mlvpn/Makefile
@@ -8,13 +8,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mlvpn
-PKG_VERSION:=2263bab
+PKG_VERSION:=8aa1b16
 PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/zehome/MLVPN.git
-PKG_SOURCE_VERSION:=2263bab7e5f983e1daa33887b53120c12646398f
-PKG_SOURCE_DATE:=2020-12-16
+PKG_SOURCE_VERSION:=8aa1b16d843ea68734e2520e39a34cb7f3d61b2b
+PKG_SOURCE_DATE:=2021-08-14
 #PKG_SOURCE_URL:=https://github.com/markfoodyburton/MLVPN.git
 #PKG_SOURCE_VERSION:=8f9720978b28c1954f9f229525333547283316d2
 #PKG_SOURCE_DATE:=2018-09-03
diff --git a/mlvpn/files/etc/config/mlvpn b/mlvpn/files/etc/config/mlvpn
index 1122794be..bbd90b5a4 100644
--- a/mlvpn/files/etc/config/mlvpn
+++ b/mlvpn/files/etc/config/mlvpn
@@ -8,4 +8,5 @@ config mlvpn 'general'
 	option host '128.128.128.128'
 	option firstport '65201'
 	option interface_name 'mlvpn0'
-	option loss_tolerance '50'
\ No newline at end of file
+	option loss_tolerance '50'
+	option latency_tolerance '300'
diff --git a/mlvpn/files/etc/init.d/mlvpn b/mlvpn/files/etc/init.d/mlvpn
index 33f6e75a9..3c11ff633 100755
--- a/mlvpn/files/etc/init.d/mlvpn
+++ b/mlvpn/files/etc/init.d/mlvpn
@@ -33,14 +33,15 @@ interface_multipath_settings() {
 }
 
 start() {
-	local enable timeout mode password reorder_buffer_size interface_name host firstport loss_tolerence
+	local enable timeout mode password reorder_buffer_size interface_name host firstport loss_tolerance latency_tolerance
 	[ "$(uci -q get mlvpn.general.enable)" = "1" ] || return 1
 	interface_name="$(uci -q get mlvpn.general.interface_name)"
 	timeout="$(uci -q get mlvpn.general.timeout)"
 	mode="$(uci -q get mlvpn.general.mode)"
 	password="$(uci -q get mlvpn.general.password)"
 	reorder_buffer_size="$(uci -q get mlvpn.general.reorder_buffer_size)"
-	loss_tolerence="$(uci -q get mlvpn.general.loss_tolerence)"
+	loss_tolerance="$(uci -q get mlvpn.general.loss_tolerance)"
+	latency_tolerance="$(uci -q get mlvpn.general.latency_tolerance)"
 	cleartext_data="$(uci -q get mlvpn.general.cleartext_data)"
 	[ -z "$cleartext_data" ] && cleartext_data="0"
 	host="$(uci -q get mlvpn.general.host)"
@@ -59,7 +60,8 @@ start() {
 	timeout = ${timeout}
 	reorder_buffer = yes
 	reorder_buffer_size = ${reorder_buffer_size}
-	loss_tolerence = ${loss_tolerence}
+	loss_tolerence = ${loss_tolerance}
+	latency_tolerence = ${latency_tolerance}
 	cleartext_data = ${cleartext_data}
 	password = "${password}"
 	mtu = 1452
diff --git a/mlvpn/patches/020-remove-cdefs.patch b/mlvpn/patches/020-remove-cdefs.patch
new file mode 100644
index 000000000..9b4bd38a0
--- /dev/null
+++ b/mlvpn/patches/020-remove-cdefs.patch
@@ -0,0 +1,33 @@
+--- a/src/vis.h.anc	2021-09-24 22:00:03.900321816 +0200
++++ b/src/vis.h	2021-09-24 22:00:21.500028958 +0200
+@@ -79,7 +79,6 @@
+  */
+ #define	UNVIS_END	1	/* no more characters */
+ 
+-#include <sys/cdefs.h>
+ 
+ __BEGIN_DECLS
+ char	*vis(char *, int, int, int);
+--- a/src/vis.h.anc	2021-09-24 22:05:19.543069573 +0200
++++ b/src/vis.h	2021-09-24 22:06:00.430389216 +0200
+@@ -80,7 +80,9 @@
+ #define	UNVIS_END	1	/* no more characters */
+ 
+ 
+-__BEGIN_DECLS
++#ifdef __cplusplus
++extern "C" {
++#endif
+ char	*vis(char *, int, int, int);
+ int	strvis(char *, const char *, int);
+ int	stravis(char **, const char *, int);
+@@ -93,6 +95,8 @@
+ ssize_t strnunvis(char *, const char *, size_t)
+ 		__attribute__ ((__bounded__(__string__,1,3)));
+ 
+-__END_DECLS
++#ifdef __cplusplus
++}
++#endif
+ 
+ #endif /* !HAVE_STRNVIS || BROKEN_STRNVIS */