diff --git a/core/libs/tests/GuestKernelSync.cpp b/core/libs/tests/GuestKernelSync.cpp
index bb227cb5e..526218a99 100644
--- a/core/libs/tests/GuestKernelSync.cpp
+++ b/core/libs/tests/GuestKernelSync.cpp
@@ -6,7 +6,9 @@
 #include <filesystem>
 #include <fstream>
 #ifdef _WIN32
+#ifndef NOMINMAX
 #define NOMINMAX
+#endif
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #endif