Index: uspace/lib/usbdev/src/hub.c
===================================================================
--- uspace/lib/usbdev/src/hub.c	(revision 1ab853969f4ab4bd3b894a43444959889f64873d)
+++ uspace/lib/usbdev/src/hub.c	(revision 0e4c5f0b7a21f09f35471fba7a626dff3790ce97)
@@ -229,5 +229,5 @@
 	 * above might use much of this time so we should only wait to fill
 	 * up the 100ms quota*/
-	const suseconds_t elapsed = tv_sub(&end_time, &start_time);
+	const suseconds_t elapsed = tv_sub_diff(&end_time, &start_time);
 	if (elapsed < 100000) {
 		async_usleep(100000 - elapsed);