1 files changed, 4 insertions, 1 deletions

diff --git a/include/uapi/linux/usbdevice_fs.h b/include/uapi/linux/usbdevice_fs.h
index 0c65e4b12617..cbf122db56bc 100644
--- a/include/uapi/linux/usbdevice_fs.h
+++ b/include/uapi/linux/usbdevice_fs.h
@@ -102,7 +102,10 @@ struct usbdevfs_urb {
         int buffer_length;
         int actual_length;
         int start_frame;
-        int number_of_packets;
+        union {
+                int number_of_packets;  /* Only used for isoc urbs */
+                unsigned int stream_id; /* Only used with bulk streams */
+        };
         int error_count;
         unsigned int signr;     /* signal to be sent on completion,
                                   or 0 if none should be sent. */