diff --git a/include/dylib.hpp b/include/dylib.hpp
index 76dbecd..b467e34 100644
--- a/include/dylib.hpp
+++ b/include/dylib.hpp
@@ -24,20 +24,10 @@
 #if (defined(_WIN32) || defined(_WIN64))
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
-#define DYLIB_UNDEFINE_LEAN_AND_MEAN
-#endif
-#ifndef NOMINMAX
-#define NOMINMAX
-#define DYLIB_UNDEFINE_NOMINMAX
-#endif
 #include <windows.h>
-#ifdef DYLIB_UNDEFINE_LEAN_AND_MEAN
 #undef WIN32_LEAN_AND_MEAN
-#undef DYLIB_UNDEFINE_LEAN_AND_MEAN
-#endif
-#ifdef DYLIB_UNDEFINE_NOMINMAX
-#undef NOMINMAX
-#undef DYLIB_UNDEFINE_NOMINMAX
+#else
+#include <windows.h>
 #endif
 #else
 #include <dlfcn.h>