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diff --git a/intern/opensubdiv/internal/opensubdiv_device_context_cuda.h b/intern/opensubdiv/internal/opensubdiv_device_context_cuda.h
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+// Adopted from OpenSubdiv with the following license:
+//
+//   Copyright 2013 Pixar
+//
+//   Licensed under the Apache License, Version 2.0 (the "Apache License")
+//   with the following modification; you may not use this file except in
+//   compliance with the Apache License and the following modification to it:
+//   Section 6. Trademarks. is deleted and replaced with:
+//
+//   6. Trademarks. This License does not grant permission to use the trade
+//      names, trademarks, service marks, or product names of the Licensor
+//      and its affiliates, except as required to comply with Section 4(c) of
+//      the License and to reproduce the content of the NOTICE file.
+//
+//   You may obtain a copy of the Apache License at
+//
+//       http: //www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the Apache License with the above modification is
+//   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+//   KIND, either express or implied. See the Apache License for the specific
+//   language governing permissions and limitations under the Apache License.
+
+#ifndef OPENSUBDIV_DEVICE_CONTEXT_CUDA_H_
+#define OPENSUBDIV_DEVICE_CONTEXT_CUDA_H_
+
+#ifdef OPENSUBDIV_HAS_CUDA
+
+struct ID3D11Device;
+
+class CudaDeviceContext {
+ public:
+  CudaDeviceContext();
+  ~CudaDeviceContext();
+
+  static bool HAS_CUDA_VERSION_4_0();
+
+  // Initialze cuda device from the current GL context.
+  bool Initialize();
+
+  // Initialze cuda device from the ID3D11Device.
+  bool Initialize(ID3D11Device* device);
+
+  // Returns true if the cuda device has already been initialized.
+  bool IsInitialized() const;
+
+ private:
+  bool initialized_;
+};
+
+#endif  // OPENSUBDIV_HAS_CUDA
+
+#endif  // _OPENSUBDIV_DEVICE_CONTEXT_CUDA_H_