diff --git a/src/CalcManager/win_data_types_cross_platform.h b/src/CalcManager/win_data_types_cross_platform.h
index ef6b8489..e474dda4 100644
--- a/src/CalcManager/win_data_types_cross_platform.h
+++ b/src/CalcManager/win_data_types_cross_platform.h
@@ -2,5 +2,10 @@
 
 #include <cstdint>
 
+#ifndef LODWORD
 #define LODWORD(qw) ((uint32_t)(qw))
+#endif
+
+#ifndef HIDWORD
 #define HIDWORD(qw) ((uint32_t)(((qw) >> 32) & 0xffffffff))
+#endif