--- ./src/google/protobuf/io/zero_copy_stream_unittest.cc.origin	2023-08-24 04:58:50.166347159 +0000
+++ ./src/google/protobuf/io/zero_copy_stream_unittest.cc	2023-08-24 04:59:27.597428707 +0000
@@ -64,6 +64,7 @@
 #include <thread>
 #include <utility>
 #include <vector>
+#include <mutex>
 
 #include "google/protobuf/stubs/common.h"
 #include "google/protobuf/testing/file.h"