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 70dd9c00d0..f729b27b93 100644
--- a/components/net/lwip-1.4.1/src/netif/ethernetif.c
+++ b/components/net/lwip-1.4.1/src/netif/ethernetif.c
@@ -483,8 +483,8 @@ rt_err_t eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_
 
 #if LWIP_NETIF_HOSTNAME
     /* Initialize interface hostname */
-	hostname = (char *)netif + sizeof(struct netif);
-    rt_sprintf(hostname, "RT-Thread_%02x%02x", name[0], name[1]);
+    hostname = (char *)netif + sizeof(struct netif);
+    rt_sprintf(hostname, "RTTHREAD_%02x%02x", name[0], name[1]);
     netif->hostname = hostname;
 #endif /* LWIP_NETIF_HOSTNAME */
 
diff --git a/components/net/lwip-2.0.2/src/netif/ethernetif.c b/components/net/lwip-2.0.2/src/netif/ethernetif.c
index 87aecdb58b..4ce0993f37 100644
--- a/components/net/lwip-2.0.2/src/netif/ethernetif.c
+++ b/components/net/lwip-2.0.2/src/netif/ethernetif.c
@@ -524,8 +524,8 @@ rt_err_t eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_
 
 #if LWIP_NETIF_HOSTNAME
     /* Initialize interface hostname */
-	hostname = (char *)netif + sizeof(struct netif);
-    rt_sprintf(hostname, "RT-Thread_%02x%02x", name[0], name[1]);
+    hostname = (char *)netif + sizeof(struct netif);
+    rt_sprintf(hostname, "RTTHREAD_%02x%02x", name[0], name[1]);
     netif->hostname = hostname;
 #endif /* LWIP_NETIF_HOSTNAME */