diff --git a/src/win32/mingw-compat.h b/src/win32/mingw-compat.h
index feedfecf4..a4a5a31c7 100644
--- a/src/win32/mingw-compat.h
+++ b/src/win32/mingw-compat.h
@@ -17,6 +17,13 @@
 #define stat _stati64
 #endif
 
+#if _WIN32_WINNT < 0x0600 && !defined(__MINGW64_VERSION_MAJOR)
+#undef MemoryBarrier
+void __mingworg_MemoryBarrier(void);
+#define MemoryBarrier __mingworg_MemoryBarrier
+#define VOLUME_NAME_DOS 0x0
+#endif
+
 #endif
 
 #endif /* INCLUDE_mingw_compat__ */