diff --git a/CMakeLists.txt b/CMakeLists.txt
index e17b062..1ba4eab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -151,6 +151,9 @@ if(WIN32)
 	list(APPEND MAIN_SOURCE assets/resources.rc)
 	list(APPEND DEFINES UNICODE)
 	list(APPEND PLATFORM_LIBRARIES Secur32)
+	include_directories(
+		${CMAKE_CURRENT_BINARY_DIR}/windows
+	)
 endif()
 
 if (STEAM)
diff --git a/binding-mri/niko-binding.cpp b/binding-mri/niko-binding.cpp
index 5b7a47c..8038e93 100644
--- a/binding-mri/niko-binding.cpp
+++ b/binding-mri/niko-binding.cpp
@@ -5,6 +5,7 @@
 #include "debugwriter.h"
 
 #if defined _WIN32
+#define OS_W32
 #include <shlwapi.h>
 #elif defined __APPLE__ || __linux__
 	#define LINUX