diff --git a/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter b/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
index cba14aef2..8a8ee9980 100755
--- a/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
+++ b/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
@@ -25,6 +25,8 @@ start_service() {
 			echo $scaling_governor > $c/scaling_governor
 		done
 	}
+	# remove sysctl already defined in /etc/sysctl.d/
+	sed -i -e '/tcp_fin_timeout/d' -e '/tcp_keepalive_time/d' -e '/nf_conntrack_max/d' /etc/sysctl.conf
 }
 
 reload_service() {