Index: uspace/drv/bus/usb/xhci/debug.c
===================================================================
--- uspace/drv/bus/usb/xhci/debug.c	(revision 09ab0a9afc9379f1604c0fd75cac2d9287ba022c)
+++ uspace/drv/bus/usb/xhci/debug.c	(revision dbcaa2d2431cd6c5df4a3aae6ef36a8262c9000f)
@@ -363,5 +363,5 @@
 {
 #define EP_DUMP_DW(name)	usb_log_debug("\t" #name ":\t0x%x", XHCI_EP_##name(*ctx))
-#define EP_DUMP_QW(name)	usb_log_debug("\t" #name ":\t0x%llx", XHCI_EP_##name(*ctx))
+#define EP_DUMP_QW(name)	usb_log_debug("\t" #name ":\t0x%" PRIx64, XHCI_EP_##name(*ctx))
 	EP_DUMP_DW(STATE);
 	EP_DUMP_DW(MULT);
Index: uspace/drv/bus/usb/xhci/isoch.c
===================================================================
--- uspace/drv/bus/usb/xhci/isoch.c	(revision 09ab0a9afc9379f1604c0fd75cac2d9287ba022c)
+++ uspace/drv/bus/usb/xhci/isoch.c	(revision dbcaa2d2431cd6c5df4a3aae6ef36a8262c9000f)
@@ -331,5 +331,5 @@
 
 		case WINDOW_INSIDE:
-			usb_log_debug("[isoch] feeding buffer %zu at 0x%llx",
+			usb_log_debug("[isoch] feeding buffer %zu at 0x%" PRIx64,
 			    it - isoch->transfers, it->mfindex);
 			it->error = schedule_isochronous_trb(ep, it);
@@ -349,6 +349,6 @@
 			 * skipped.
 			 */
-			usb_log_debug("[isoch] missed feeding buffer %zu at 0x%llx by "
-			    "%llu uframes", it - isoch->transfers, it->mfindex, wd.offset);
+			usb_log_debug("[isoch] missed feeding buffer %zu at 0x%" PRIx64 " by "
+			    "%" PRIu64 " uframes", it - isoch->transfers, it->mfindex, wd.offset);
 			it->state = ISOCH_COMPLETE;
 			it->error = EOK;
@@ -422,6 +422,6 @@
 			goto out;
 		case WINDOW_TOO_LATE:
-			usb_log_debug("[isoch] missed feeding buffer %zu at 0x%llx by"
-			    "%llu uframes", it - isoch->transfers, it->mfindex, wd.offset);
+			usb_log_debug("[isoch] missed feeding buffer %zu at 0x%" PRIx64 " by"
+			    "%" PRIu64 " uframes", it - isoch->transfers, it->mfindex, wd.offset);
 			/* Missed the opportunity to schedule. Schedule ASAP. */
 			it->mfindex += wd.offset;
@@ -435,5 +435,5 @@
 			isoch->last_mf = it->mfindex;
 
-			usb_log_debug("[isoch] feeding buffer %zu at 0x%llx",
+			usb_log_debug("[isoch] feeding buffer %zu at 0x%" PRIx64,
 			    it - isoch->transfers, it->mfindex);
 
@@ -520,5 +520,5 @@
 	calc_next_mfindex(ep, it);
 	isoch->last_mf = it->mfindex;
-	usb_log_debug("[isoch] buffer %zu will be on schedule at 0x%llx",
+	usb_log_debug("[isoch] buffer %zu will be on schedule at 0x%" PRIx64,
 	    it - isoch->transfers, it->mfindex);