diff --git a/components/net/Kconfig b/components/net/Kconfig
index 43473af4099c19a6744510bf67b150c3d2d02148..750f419cc950746fc995a869889e5368b6c40d64 100755
--- a/components/net/Kconfig
+++ b/components/net/Kconfig
@@ -3,7 +3,7 @@ menu "Network stack"
 menu "light weight TCP/IP stack"
 config RT_USING_LWIP
     bool "Enable lwIP stack"
-	select RT_USING_DEVICE
+    select RT_USING_DEVICE
     default n
 
     if RT_USING_LWIP
diff --git a/components/net/lwip-1.4.1/src/lwipopts.h b/components/net/lwip-1.4.1/src/lwipopts.h
index 8b4d38961eaf3db6baf6cbafb377eb352c95ac8f..f07e9d51f5927a677f126b9c756aa75e15a59514 100644
--- a/components/net/lwip-1.4.1/src/lwipopts.h
+++ b/components/net/lwip-1.4.1/src/lwipopts.h
@@ -36,7 +36,10 @@
 #define LWIP_HAVE_LOOPIF            0
 
 #define LWIP_PLATFORM_BYTESWAP      0
+
+#ifndef BYTE_ORDER
 #define BYTE_ORDER                  LITTLE_ENDIAN
+#endif
 
 /* #define RT_LWIP_DEBUG */