diff --git a/README.md b/README.md
index 1662982..1184ee7 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ SPIFFS              | ❌              | ❌
 BLE                 | -              | ❌
 NTP                 | ❌              | ❌
 OTA                 | ✔️             | ❌
-MDNS                | ✔️             | ✔️
+MDNS                | ✔️             | ❗
 MQTT                | ✅              | ❌
 SD                  | ❌              | ❌
 
diff --git a/arduino/libretuya/libraries/mDNS/LwIPmDNS.cpp b/arduino/libretuya/libraries/mDNS/LwIPmDNS.cpp
index 4c813b9..f4735bc 100644
--- a/arduino/libretuya/libraries/mDNS/LwIPmDNS.cpp
+++ b/arduino/libretuya/libraries/mDNS/LwIPmDNS.cpp
@@ -61,6 +61,7 @@ bool mDNS::begin(const char *hostname) {
 	struct netif *netif = netif_list;
 	uint8_t enabled		= 0;
 	while (netif != NULL) {
+		netif->flags |= NETIF_FLAG_IGMP;
 		// TODO: detect mdns_netif_client_id by checking netif_get_client_data()
 		// and finding the requested hostname in struct mdns_host
 		if (netif_is_up(netif) && mdns_resp_add_netif(netif, hostname, 255) == ERR_OK) {
@@ -100,7 +101,7 @@ bool mDNS::addService(char *service, char *proto, uint16_t port) {
 	struct netif *netif = netif_list;
 	while (netif != NULL) {
 		if (netif_is_up(netif)) {
-			mdns_resp_add_service(netif, mdnsInstanceName.c_str(), service, protocol, port, 255, NULL, NULL);
+			mdns_resp_add_service(netif, mdnsInstanceName.c_str(), _service, protocol, port, 255, NULL, NULL);
 		}
 		netif = netif->next;
 	}
diff --git a/builder/frameworks/beken-72xx-sdk.py b/builder/frameworks/beken-72xx-sdk.py
index 35690fd..5aab8aa 100644
--- a/builder/frameworks/beken-72xx-sdk.py
+++ b/builder/frameworks/beken-72xx-sdk.py
@@ -350,9 +350,6 @@ env.AddLibrary(
         "+<lwip-2.0.2/src/core/ipv6/*.c>",
         "+<lwip-2.0.2/src/netif/ethernet.c>",
         "+<dhcpd/*.c>",
-        # use ethernetif.c from AliOS since it enables netif IGMP flag
-        "-<lwip-2.0.2/port/ethernetif.c>",
-        "+<$SDK_DIR/beken378/alios/lwip-2.0.2/port/ethernetif.c>",
     ],
     includes=[
         "+<lwip-2.0.2/port>",