osPoolDef instead of _declare_box in a typedef struct

Hello Everyone,

I'm doing migration from RTX to CMSIS-RTOS following the apnt_264.

In the RTX case I declared a box inside a typedef struct as in the following code:

typedef struct mystruct_s
{
    _declare_box(name_box, sizeof(type_t), QUEUE_SIZE);
}mystruct_t;

and this compiles correctly.

In the CMSIS-RTOS case I substituted the previous code with this:

typedef struct mystruct_s
{
   osPoolDef (name_box, QUEUE_SIZE, type_t);
}mystruct_t;

but it does not compile and I have the following message:

error: expected ';' at the end of declaration list

Do you know why it happens and how to solve it?

Regards
Dario