如何消除这种警告错误？？？？

typedef struct _USB_DESCRIPTOR_REQUEST {
ULONG ConnectionIndex;
struct {
UCHAR bmRequest;
UCHAR bRequest;
USHORT wValue;
USHORT wIndex;
USHORT wLength;
} SetupPacket;
UCHAR Data[0];
} USB_DESCRIPTOR_REQUEST, *PUSB_DESCRIPTOR_REQUEST;


d:\winddk\2600\inc\wxp\usbioctl.h(449) : warning C4200: nonstandard extension used : zero-sized array in struct/union