diff --git a/TC1/http_server/web_log.h b/TC1/http_server/web_log.h
index b7eb5c7..66b5a04 100644
--- a/TC1/http_server/web_log.h
+++ b/TC1/http_server/web_log.h
@@ -1,6 +1,9 @@
+#ifndef WEB_LOG_H
+#define WEB_LOG_H
 
 #define LOG_NUM 100
 #define LOG_LEN 128
+
 typedef struct
 {
     int idx;
@@ -13,9 +16,9 @@ extern char* LOG_TMP;
 void SetLogRecord(LogRecord* lr, char* log);
 char* GetLogRecord(int idx);
 
-
-#define web_log(format, ...)                            \
+#define web_log(format, ...)                           \
     LOG_TMP = (char*)malloc(sizeof(char)*LOG_LEN);     \
     snprintf(LOG_TMP, LOG_LEN, format, ##__VA_ARGS__); \
     SetLogRecord(&log_record, LOG_TMP);                \
 
+#endif // !WEB_LOG_H