diff --git a/include/util/tbuffer.h b/include/util/tbuffer.h
index 009d7bf23b..e2b9f192a7 100644
--- a/include/util/tbuffer.h
+++ b/include/util/tbuffer.h
@@ -16,6 +16,8 @@
 #ifndef _TD_UTIL_BUFFER_H
 #define _TD_UTIL_BUFFER_H
 
+#include "os.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif