diff --git a/components/net/Kconfig b/components/net/Kconfig
old mode 100755
new mode 100644
index 750f419cc950746fc995a869889e5368b6c40d64..282ea7e77629a67422a8408510005e6f0cbf3058
--- a/components/net/Kconfig
+++ b/components/net/Kconfig
@@ -180,6 +180,15 @@ config RT_USING_LWIP
         config LWIP_SO_RCVBUF
             int "Enable SO_RCVBUF processing"
             default 1
+
+        config RT_LWIP_NETIF_LOOPBACK
+            bool "Enable netif loopback"
+            default n
+
+        config LWIP_NETIF_LOOPBACK
+        	int
+        	default 1 if RT_LWIP_NETIF_LOOPBACK
+        	default 0 if !RT_LWIP_NETIF_LOOPBACK
     endif
 
 endmenu