diff --git a/radiant/main.cpp b/radiant/main.cpp
index 03f186cb..15baa3c0 100644
--- a/radiant/main.cpp
+++ b/radiant/main.cpp
@@ -89,6 +89,10 @@ DefaultAllocator - Memory allocation using new/delete, compliant with std::alloc
 #include "referencecache.h"
 #include "stacktrace.h"
 
+#ifdef WIN32
+#include <windows.h>
+#endif
+
 void show_splash();
 void hide_splash();