diff --git a/Platform/user/ulog/ulog-api/ulog_api.c b/Platform/user/ulog/ulog-api/ulog_api.c
index 77be8c31a..4cdd75a31 100755
--- a/Platform/user/ulog/ulog-api/ulog_api.c
+++ b/Platform/user/ulog/ulog-api/ulog_api.c
@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
+#include <string.h>
+
 
 #include "ulog.h"
 #include "common_types.h"