Problem with exec sql include

Hello.

I have a 2 files:  test.h and test.pgc.

In test.h, I defined:

typedef struct {
        long curid;
        char curnombre[20];
        char curfecha[10];
} struct_cursor;

And, in test.pgc, I want to declare:

    EXEC SQL BEGIN DECLARE SECTION;
        struct_cursor t_cursor;
    EXEC SQL END DECLARE SECTION;

But, when I do:  ecpg -I/<include_file_path> test.pgc,
I get:  test.pgc:7: ERROR: invalid datatype 'struct_cursor'

I know that I can include the typedef at DECLARE SECTION, but I don't
want to use that (test.h and test.pgc are only examples of the problem
bigest).

How can I resolve this?

Thanks.

CG