/* USB output transfer completion callback.
*/
-static void receive_transfer_out(struct libusb_transfer *transfer)
+static void LIBUSB_CALL receive_transfer_out(struct libusb_transfer *transfer)
{
struct sr_dev_inst *sdi;
struct dev_context *devc;
/* USB input transfer completion callback.
*/
-static void receive_transfer_in(struct libusb_transfer *transfer)
+static void LIBUSB_CALL receive_transfer_in(struct libusb_transfer *transfer)
{
struct sr_dev_inst *sdi;
struct dev_context *devc;