Simple Fibonacci program can't be parsed

I'm trying this one:

```
[x] > fibo
  if. > @
    x.lt 2
    1
    plus.
      fibo (x.minus 1)
      fibo (x.minus 2)
```

I'm getting:

```
5:9:
  |
5 |     plus.
  |         ^^
unexpected ".<newline>"
expecting '#', ''', '+', '-', '_', end of line, letter, numeric character, or space
```