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 4c0772669..7effef0dd 100755
--- a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
+++ b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
@@ -431,7 +431,7 @@ if [ "$OMR_TRACKER_INTERFACE" = "glorytun" ] || [ "$OMR_TRACKER_INTERFACE" = "om
 					uci -q set openmptcprouter.$OMR_TRACKER_INTERFACE.lc=$(date +"%s")
 				}
 			} || {
-				local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 8.8.8.8)
+				local mtu=$(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 $mtu > /dev/null 2>&1
@@ -642,7 +642,7 @@ if [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.lc)" = "" ] || [ $(($(
 					ip link set dev $OMR_TRACKER_DEVICE mtu $mtu > /dev/null 2>&1
 				}
 			} || {
-				local mtu=$(omr-mtu $OMR_TRACKER_DEVICE_IP 8.8.8.8)
+				local mtu=$(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