diff --git a/components/net/lwip-2.1/porting/src/sys_arch.c b/components/net/lwip-2.1/porting/src/sys_arch.c
index 1c1ae6f3aa3efa148261be8cc38677155597f539..2aa498024661faad4256fd391d08b6fd5912472a 100755
--- a/components/net/lwip-2.1/porting/src/sys_arch.c
+++ b/components/net/lwip-2.1/porting/src/sys_arch.c
@@ -41,8 +41,14 @@
 #include <los_timer.h>
 #include <los_config.h>
 
+#ifndef YES
 #define YES 1
+#endif
+
+#ifndef NO
 #define NO 0
+#endif
+
 #define LOSCFG_KERNEL_SMP NO
 
 #if (LOSCFG_KERNEL_SMP == YES)