diff --git a/include/vkd3d_d3d12.idl b/include/vkd3d_d3d12.idl
index ae9498fc..71faf611 100644
--- a/include/vkd3d_d3d12.idl
+++ b/include/vkd3d_d3d12.idl
@@ -5123,6 +5123,10 @@ typedef HRESULT (__stdcall *PFN_D3D12_GET_DEBUG_INTERFACE)(REFIID iid, void **de
 [local] HRESULT __stdcall D3D12EnableExperimentalFeatures(UINT feature_count,
         const IID *iids, void *configurations, UINT *configurations_sizes);
 
+cpp_quote("static const UUID D3D12ExperimentalShaderModels = { 0x76f5573e, 0xf13a, 0x40f5, { 0xb2, 0x97, 0x81, 0xce, 0x9e, 0x18, 0x93, 0x3f } };")
+cpp_quote("static const UUID D3D12TiledResourceTier4 = { 0xc9c4725f, 0xa81a, 0x4f56, { 0x8c, 0x5b, 0xc5, 0x10, 0x39, 0xd6, 0x94, 0xfb } };")
+cpp_quote("static const UUID D3D12MetaCommand = { 0xc734c97e, 0x8077, 0x48c8, { 0x9f, 0xdc, 0xd9, 0xd1, 0xdd, 0x31, 0xdd, 0x77 } };")
+
 typedef HRESULT (__stdcall *PFN_D3D12_GET_INTERFACE)(REFCLSID clsid, REFIID iid, void **debug);
 
 [local] HRESULT __stdcall D3D12GetInterface(REFCLSID clsid, REFIID iid, void **debug);
diff --git a/include/vkd3d_windows.h b/include/vkd3d_windows.h
index d53fd00b..7b0e972d 100644
--- a/include/vkd3d_windows.h
+++ b/include/vkd3d_windows.h
@@ -126,6 +126,7 @@ typedef struct _GUID
 
 typedef GUID IID;
 typedef GUID CLSID;
+typedef GUID UUID;
 
 # ifdef INITGUID
 #  ifndef __cplusplus