diff --git a/include/d3d11.idl b/include/d3d11.idl
index 1740ca6eac6..3aff03448c4 100644
--- a/include/d3d11.idl
+++ b/include/d3d11.idl
@@ -35,6 +35,15 @@ interface ID3D11VideoProcessorInputView;
 cpp_quote("#ifndef _D3D11_CONSTANTS")
 cpp_quote("#define _D3D11_CONSTANTS")
 
+const UINT D3D11_16BIT_INDEX_STRIP_CUT_VALUE = 0xffff;
+const UINT D3D11_32BIT_INDEX_STRIP_CUT_VALUE = 0xffffffff;
+const UINT D3D11_8BIT_INDEX_STRIP_CUT_VALUE = 0xff;
+
+const UINT D3D11_ARRAY_AXIS_ADDRESS_RANGE_BIT_COUNT = 9;
+
+const UINT D3D11_CLIP_OR_CULL_DISTANCE_COUNT = 8;
+const UINT D3D11_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT = 2;
+
 const UINT D3D11_COMMONSHADER_CONSTANT_BUFFER_API_SLOT_COUNT      = 14;
 const UINT D3D11_COMMONSHADER_CONSTANT_BUFFER_COMPONENTS          = 4;
 const UINT D3D11_COMMONSHADER_CONSTANT_BUFFER_COMPONENT_BIT_COUNT = 32;