Index: uspace/lib/usbdev/include/usb/dev/pipes.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/pipes.h	(revision 6b433a80b98bf4490e3bfe28af7af8fe99fc86ab)
+++ uspace/lib/usbdev/include/usb/dev/pipes.h	(revision 02a75755b7fac88d134ed20725eeb157685bf61b)
@@ -58,4 +58,8 @@
 	/** The connection used for sending the data. */
 	usb_dev_session_t *bus_session;
+	/** The session used for isochronous endpoints.
+	 * Required as isochronous sends/receive can block the session.
+	 */
+	usb_dev_session_t *isoch_session;
 } usb_pipe_t;