diff --git a/components/net/lwip-1.4.1/src/netif/ethernetif.c b/components/net/lwip-1.4.1/src/netif/ethernetif.c
index 75f86d75d8eedf50c4a218dd129bcbf4dac5cdf8..85ac09524b114b3925adf1ac8f2c87dca45b2f62 100644
--- a/components/net/lwip-1.4.1/src/netif/ethernetif.c
+++ b/components/net/lwip-1.4.1/src/netif/ethernetif.c
@@ -452,7 +452,11 @@ rt_err_t eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_
         rt_kprintf("malloc netif failed\n");
         return -RT_ERROR;
     }
+#if LWIP_NETIF_HOSTNAME
+    rt_memset(netif, 0, sizeof(struct netif) + LWIP_HOSTNAME_LEN);
+#else
     rt_memset(netif, 0, sizeof(struct netif));
+#endif
 
     /* set netif */
     dev->netif = netif;