diff --git a/rEFIt_UEFI/cpp_unit_test/XUINTN_test.cpp b/rEFIt_UEFI/cpp_unit_test/XUINTN_test.cpp
index baea6b284..3cd406703 100755
--- a/rEFIt_UEFI/cpp_unit_test/XUINTN_test.cpp
+++ b/rEFIt_UEFI/cpp_unit_test/XUINTN_test.cpp
@@ -4,6 +4,10 @@
 
 #include <stdio.h>
 
+#ifdef _MSC_VER
+#pragma warning(disable : 4310)
+#endif
+
 #define CHECK_CTOR_FAIL(value, code) \
 { \
 	stop_at_panic = false; \