diff --git a/ultramodern/include/ultramodern/ultramodern.hpp b/ultramodern/include/ultramodern/ultramodern.hpp
index b264a45..af2100d 100644
--- a/ultramodern/include/ultramodern/ultramodern.hpp
+++ b/ultramodern/include/ultramodern/ultramodern.hpp
@@ -13,6 +13,7 @@
 
 #if defined(_WIN32)
 #   define WIN32_LEAN_AND_MEAN
+#   include <Windows.h>
 #elif defined(__ANDROID__)
 #   include "android/native_window.h"
 #elif defined(__linux__)