cmp.mapping(function(fallback)
              local line, col = unpack(vim.api.nvim_win_get_cursor(0))

              -- When the selection menu is open select the next item
              if cmp.visible() then
                cmp.select_next_item()
              -- Ensure we are mid word
              elseif col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil then
                -- Open the selection menu
                cmp.complete()
                -- Autocomplete when there is only 1 selection available
                if #cmp.get_entries() == 1 then
                  cmp.confirm({ select = true })
                end
              -- Keep regular functionality of tab
              else
                fallback()
              end
            end, {'i', 's'})