diff --git a/opencl/khronos/headers/opencl1.2/CL/cl_ext.h b/opencl/khronos/headers/opencl1.2/CL/cl_ext.h
index 5b3cb5e1e1..b54f1b9858 100644
--- a/opencl/khronos/headers/opencl1.2/CL/cl_ext.h
+++ b/opencl/khronos/headers/opencl1.2/CL/cl_ext.h
@@ -1,3 +1,4 @@
+/* Modifications Copyright (C) 2010-2021 Advanced Micro Devices, Inc. */
 /*******************************************************************************
  * Copyright (c) 2008-2015 The Khronos Group Inc.
  *
diff --git a/opencl/khronos/headers/opencl2.0/CL/cl_ext.h b/opencl/khronos/headers/opencl2.0/CL/cl_ext.h
index dfa4130694..01e5f2dcef 100644
--- a/opencl/khronos/headers/opencl2.0/CL/cl_ext.h
+++ b/opencl/khronos/headers/opencl2.0/CL/cl_ext.h
@@ -1,3 +1,4 @@
+/* Modifications Copyright (C) 2010-2021 Advanced Micro Devices, Inc. */
 /*******************************************************************************
  * Copyright (c) 2008-2015 The Khronos Group Inc.
  *
diff --git a/opencl/khronos/headers/opencl2.1/CL/cl_ext.h b/opencl/khronos/headers/opencl2.1/CL/cl_ext.h
index 219a8cbfbb..7cb0761022 100644
--- a/opencl/khronos/headers/opencl2.1/CL/cl_ext.h
+++ b/opencl/khronos/headers/opencl2.1/CL/cl_ext.h
@@ -1,3 +1,4 @@
+/* Modifications Copyright (C) 2010-2021 Advanced Micro Devices, Inc. */
 /*******************************************************************************
  * Copyright (c) 2008-2015 The Khronos Group Inc.
  *
diff --git a/opencl/khronos/headers/opencl2.2/CL/cl_ext.h b/opencl/khronos/headers/opencl2.2/CL/cl_ext.h
index 4d6d8c093a..cea3dc8fa5 100644
--- a/opencl/khronos/headers/opencl2.2/CL/cl_ext.h
+++ b/opencl/khronos/headers/opencl2.2/CL/cl_ext.h
@@ -1,3 +1,4 @@
+/* Modifications Copyright (C) 2010-2021 Advanced Micro Devices, Inc. */
 /*******************************************************************************
  * Copyright (c) 2008-2019 The Khronos Group Inc.
  *