diff --git a/include/vkd3d_d3d12.idl b/include/vkd3d_d3d12.idl
index 4b967d48..d647b48c 100644
--- a/include/vkd3d_d3d12.idl
+++ b/include/vkd3d_d3d12.idl
@@ -2213,7 +2213,12 @@ interface ID3D12RootSignatureDeserializer : IUnknown
         const D3D12_VERSIONED_ROOT_SIGNATURE_DESC *root_signature_desc,
         ID3DBlob **blob, ID3DBlob **error_blob);
 
+typedef HRESULT (__stdcall *PFN_D3D12_CREATE_DEVICE)(IUnknown *adapter,
+        D3D_FEATURE_LEVEL minimum_feature_level, REFIID iid, void **device);
+
 [local] HRESULT __stdcall D3D12CreateDevice(IUnknown *adapter,
         D3D_FEATURE_LEVEL minimum_feature_level, REFIID iid, void **device);
 
+typedef HRESULT (__stdcall *PFN_D3D12_GET_DEBUG_INTERFACE)(REFIID iid, void **debug);
+
 [local] HRESULT __stdcall D3D12GetDebugInterface(REFIID iid, void **debug);