diff --git a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
index d837d2623..15d729cec 100755
--- a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
+++ b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
@@ -671,26 +671,28 @@ if [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ] || [ $(($(
 		[ -n "$asn" ] && {
 			uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.asn="$asn"
 		}
-		if [ -n "$(uci -q get network.$OMR_TRACKER_INTERFACE.mtu)" ]; then
-			mtu=$(uci -q get network.$OMR_TRACKER_INTERFACE.mtu)
-			[ -n "$mtu" ] && {
-				uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
-				ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
-			}
-		else
-			[ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ] && {
-				local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
+		if [ "$OMR_TRACKER_INTERFACE" != "omrvpn" ] && [ "$(uci -q get glorytun.vpn.enable)" != "1" ]; then
+			if [ -n "$(uci -q get network.$OMR_TRACKER_INTERFACE.mtu)" ]; then
+				mtu=$(uci -q get network.$OMR_TRACKER_INTERFACE.mtu)
 				[ -n "$mtu" ] && {
 					uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
 					ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 				}
-			} || {
-				local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 1.1.1.1)
-				[ -n "$mtu" ] && {
-					uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
-					ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
+			else
+				[ -n "$serverip" ] && [ "$serverip" != "127.0.0.1" ] && {
+					local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP $serverip)
+					[ -n "$mtu" ] && {
+						uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
+						ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
+					}
+				} || {
+					local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 1.1.1.1)
+					[ -n "$mtu" ] && {
+						uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.mtu=$mtu
+						ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
+					}
 				}
-			}
+			fi
 		fi
 		uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.state='up'
 		uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.lc=$(date +"%s")