diff --git a/include/linux/usb.h b/include/linux/usb.h
index 0c05ff6..db8808e 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1177,7 +1177,7 @@
 	unsigned int transfer_flags;	/* (in) URB_SHORT_NOT_OK | ...*/
 	void *transfer_buffer;		/* (in) associated data buffer */
 	dma_addr_t transfer_dma;	/* (in) dma addr for transfer_buffer */
-	int transfer_buffer_length;	/* (in) data buffer length */
+	u32 transfer_buffer_length;	/* (in) data buffer length */
 	int actual_length;		/* (return) actual transfer length */
 	unsigned char *setup_packet;	/* (in) setup packet (control only) */
 	dma_addr_t setup_dma;		/* (in) dma addr for setup_packet */