diff --git a/components/net/netdev/src/netdev.c b/components/net/netdev/src/netdev.c
index 04bf6e8ad7..92d5b188eb 100644
--- a/components/net/netdev/src/netdev.c
+++ b/components/net/netdev/src/netdev.c
@@ -78,7 +78,7 @@ int netdev_register(struct netdev *netdev, const char *name, void *user_data)
     netdev->addr_callback = RT_NULL;
 
     /* fill network interface device */
-    rt_strncpy(netdev->name, name, rt_strlen(name));
+    rt_strncpy(netdev->name, name, RT_NAME_MAX);
     netdev->user_data = user_data;
 
     /* initialize current network interface device single list */
@@ -260,7 +260,7 @@ struct netdev *netdev_get_by_name(const char *name)
     for (node = &(netdev_list->list); node; node = rt_slist_next(node))
     {
         netdev = rt_slist_entry(node, struct netdev, list);
-        if (netdev && (rt_strncmp(netdev->name, name, rt_strlen(netdev->name)) == 0))
+        if (netdev && (rt_strncmp(netdev->name, name, RT_NAME_MAX) == 0))
         {
             rt_hw_interrupt_enable(level);
             return netdev;