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