diff --git a/src/port/ui/UIWidgets.cpp b/src/port/ui/UIWidgets.cpp
index 00f6499b..1aa98ec1 100644
--- a/src/port/ui/UIWidgets.cpp
+++ b/src/port/ui/UIWidgets.cpp
@@ -1,3 +1,4 @@
+#define NOMINMAX  // prevent defining min/max macros on windows
 #include "UIWidgets.h"
 
 #include "libultraship/src/Context.h"