diff --git a/podkop/files/etc/init.d/podkop b/podkop/files/etc/init.d/podkop
index 9ca6263..1ac9112 100755
--- a/podkop/files/etc/init.d/podkop
+++ b/podkop/files/etc/init.d/podkop
@@ -13,6 +13,7 @@ start_service() {
 
     sing_box_version=$(sing-box version | head -n 1 | awk '{print $3}')
     required_version="1.11.1"
+    resolv_conf="/etc/resolv.conf"
 
     if [ "$(echo -e "$sing_box_version\n$required_version" | sort -V | head -n 1)" != "$required_version" ]; then
         echo "The version of sing-box ($sing_box_version) is lower than the minimum version. Update sing-box: opkg update && opkg remove sing-box && opkg install sing-box"