Index: uspace/drv/bus/usb/xhci/trb_ring.c
===================================================================
--- uspace/drv/bus/usb/xhci/trb_ring.c	(revision 548c1238cba73184d31834477064377b71bc546c)
+++ uspace/drv/bus/usb/xhci/trb_ring.c	(revision cc9ac7ced24eaa2d634af9f10f8c1745b4613547)
@@ -173,5 +173,5 @@
 	trb_segment_t * const saved_enqueue_segment = ring->enqueue_segment;
 	if (phys)
-		*phys = NULL;
+		*phys = (uintptr_t)NULL;
 
 	/*