[O] org-babel ocaml List append problems

[James Hurford]

I have just discovered org-babel supports ocaml and I've just started to
learn it.  My problem is when appending two lists together, when run
through org-babel returns a error message.  I would try and run this
code

[3;2;3] @ [3;2;3;4;5];;

and get a error message saying

"Invalid function: 3"

Is there a solution to this as the code should work?

James