Index: uspace/lib/usbvirt/include/usbvirt/device.h
===================================================================
--- uspace/lib/usbvirt/include/usbvirt/device.h	(revision 266d0871dba029aae0bcd196cb56080cb90b71b7)
+++ uspace/lib/usbvirt/include/usbvirt/device.h	(revision f37f81191e1d41ef7d1cc5b6d9a9eaae109ddb4d)
@@ -180,4 +180,7 @@
 	usbvirt_device_ops_t *ops;
 	
+	/** Custom device data. */
+	void *device_data;
+
 	/** Reply onto control transfer.
 	 */