diff --git a/Ubiquitous/XiZi_IIoT/resources/ethernet/cmd_lwip/lwip_udp_demo.c b/Ubiquitous/XiZi_IIoT/resources/ethernet/cmd_lwip/lwip_udp_demo.c
index 0456aa419..cc41a965e 100755
--- a/Ubiquitous/XiZi_IIoT/resources/ethernet/cmd_lwip/lwip_udp_demo.c
+++ b/Ubiquitous/XiZi_IIoT/resources/ethernet/cmd_lwip/lwip_udp_demo.c
@@ -20,10 +20,10 @@
 #include "board.h"
 #include "sys_arch.h"
 #include "lwip/udp.h"
-#include "lwip/sockets.h"
 #include <shell.h>
 #include <sys.h>
 #include <xizi.h>
+#include <lwip/sockets.h>
 
 
 #define PBUF_SIZE 27
@@ -102,7 +102,7 @@ void *LwipUdpSendTest(int argc, char *argv[])
         udp_interval = 100;
     } else {
         strncpy(udp_demo_msg, argv[1], strlen(argv[1]));
-        strncat(udp_demo_msg, "\r\n", 2);
+        strncat(udp_demo_msg, "\r\n", 3);
         if(argc == 3) {
             sscanf(argv[2], "%d.%d.%d.%d:%d", &udp_server_ip[0], &udp_server_ip[1], &udp_server_ip[2], &udp_server_ip[3], &udp_server_port);
         }