diff --git a/src/brpc/http2.h b/src/brpc/http2.h
index 9a40d40dac..69d30874fb 100644
--- a/src/brpc/http2.h
+++ b/src/brpc/http2.h
@@ -18,6 +18,7 @@
 #ifndef BAIDU_RPC_HTTP2_H
 #define BAIDU_RPC_HTTP2_H
 
+#include <cstdint>
 #include "brpc/http_status_code.h"
 
 // To baidu-rpc developers: This is a header included by user, don't depend