diff --git a/libs/vkd3d/command.c b/libs/vkd3d/command.c
index 937c7e37..06823c89 100644
--- a/libs/vkd3d/command.c
+++ b/libs/vkd3d/command.c
@@ -4087,6 +4087,10 @@ static void STDMETHODCALLTYPE d3d12_command_list_EndEvent(ID3D12GraphicsCommandL
     FIXME("iface %p stub!\n", iface);
 }
 
+STATIC_ASSERT(sizeof(VkDispatchIndirectCommand) == sizeof(D3D12_DISPATCH_ARGUMENTS));
+STATIC_ASSERT(sizeof(VkDrawIndexedIndirectCommand) == sizeof(D3D12_DRAW_INDEXED_ARGUMENTS));
+STATIC_ASSERT(sizeof(VkDrawIndirectCommand) == sizeof(D3D12_DRAW_ARGUMENTS));
+
 static void STDMETHODCALLTYPE d3d12_command_list_ExecuteIndirect(ID3D12GraphicsCommandList *iface,
         ID3D12CommandSignature *command_signature, UINT max_command_count, ID3D12Resource *arg_buffer,
         UINT64 arg_buffer_offset, ID3D12Resource *count_buffer, UINT64 count_buffer_offset)