diff --git a/luci-app-omr-bypass/root/etc/init.d/omr-bypass b/luci-app-omr-bypass/root/etc/init.d/omr-bypass
index 6c9eeca9f..97901ad35 100755
--- a/luci-app-omr-bypass/root/etc/init.d/omr-bypass
+++ b/luci-app-omr-bypass/root/etc/init.d/omr-bypass
@@ -10,7 +10,9 @@ EXTRA_COMMANDS="reload_rules"
 
 _add_proto() {
 	protoname=$1
-	echo "add_custom $protoname" >/proc/net/xt_ndpi/proto
+	if [ "$(dd if=/proc/net/xt_ndpi/proto bs=4096 | grep $protoname)" = "" ]; then
+		echo "add_custom $protoname" >/proc/net/xt_ndpi/proto
+	fi
 	hosts="$( uci -q get omr-bypass.$protoname.url )"
 	for url in $hosts; do
 		echo "$protoname:$url" >/proc/net/xt_ndpi/host_proto