diff --git a/Samples/5_Domain_Specific/simpleD3D12/DX12CudaSample.h b/Samples/5_Domain_Specific/simpleD3D12/DX12CudaSample.h
index 903ed717..bdf94a90 100644
--- a/Samples/5_Domain_Specific/simpleD3D12/DX12CudaSample.h
+++ b/Samples/5_Domain_Specific/simpleD3D12/DX12CudaSample.h
@@ -52,6 +52,9 @@ The MIT License (MIT)
 
 #pragma once
 
+#include <d3d12.h>
+#include <dxgi1_6.h>
+
 #include "DXSampleHelper.h"
 #include "Win32Application.h"
 
diff --git a/Samples/5_Domain_Specific/simpleD3D12/DXSampleHelper.h b/Samples/5_Domain_Specific/simpleD3D12/DXSampleHelper.h
index be069074..5f35da3c 100644
--- a/Samples/5_Domain_Specific/simpleD3D12/DXSampleHelper.h
+++ b/Samples/5_Domain_Specific/simpleD3D12/DXSampleHelper.h
@@ -52,7 +52,13 @@ The MIT License (MIT)
 
 #pragma once
 
+// includes for Windows
+#include <d3d12.h> // DirectX 12 header
 #include <stdexcept>
+#include <windows.h>                   // Windows Platform SDK - must come first
+#include <wrl.h>                       // For basic WRL support
+#include <wrl/client.h>                // For ComPtr
+#include <wrl/wrappers/corewrappers.h> // For Wrappers::FileHandle
 // Note that while ComPtr is used to manage the lifetime of resources on the
 // CPU, it has no understanding of the lifetime of resources on the GPU. Apps
 // must account for the GPU lifetime of resources to avoid destroying objects
diff --git a/Samples/5_Domain_Specific/simpleD3D12/simpleD3D12.h b/Samples/5_Domain_Specific/simpleD3D12/simpleD3D12.h
index 411dae86..66e291d1 100644
--- a/Samples/5_Domain_Specific/simpleD3D12/simpleD3D12.h
+++ b/Samples/5_Domain_Specific/simpleD3D12/simpleD3D12.h
@@ -27,8 +27,15 @@
 
 #pragma once
 
+#include <DirectXMath.h>
+#include <d3d12.h>
+#include <d3dcompiler.h>
+#include <dxgi1_6.h>
+#include <wrl.h>
+
 #include "DX12CudaSample.h"
 #include "ShaderStructs.h"
+#include "d3dx12.h"
 
 using namespace DirectX;