Index: uspace/drv/bus/usb/usbdiag/tests.c
===================================================================
--- uspace/drv/bus/usb/usbdiag/tests.c	(revision a94cbfa1045ccc51f38426d1ef32bc75b14c5d5d)
+++ uspace/drv/bus/usb/usbdiag/tests.c	(revision 80f7c542f46cabfa62d4645700e924a848e61074)
@@ -187,5 +187,7 @@
 		for (size_t i = 0; i < size; i += sizeof(test_data)) {
 			if (*(uint32_t *)(buffer + i) != test_data) {
-				usb_log_error("Read of %s IN endpoint returned invald data at address %lu.", usb_str_transfer_type(pipe->desc.transfer_type), i);
+				usb_log_error("Read of %s IN endpoint returned "
+				    "invald data at address %zu.",
+				    usb_str_transfer_type(pipe->desc.transfer_type), i);
 				rc = EINVAL;
 				break;
Index: uspace/drv/bus/usb/xhci/isoch.c
===================================================================
--- uspace/drv/bus/usb/xhci/isoch.c	(revision a94cbfa1045ccc51f38426d1ef32bc75b14c5d5d)
+++ uspace/drv/bus/usb/xhci/isoch.c	(revision 80f7c542f46cabfa62d4645700e924a848e61074)
@@ -319,5 +319,5 @@
 		case WINDOW_TOO_SOON: {
 			const suseconds_t delay = wd.offset * 125;
-			usb_log_debug("[isoch] delaying feeding buffer %lu for %ldus",
+			usb_log_debug("[isoch] delaying feeding buffer %zu for %ldus",
 				it - isoch->transfers, delay);
 			fibril_timer_set_locked(isoch->feeding_timer, delay,
@@ -327,5 +327,5 @@
 
 		case WINDOW_INSIDE:
-			usb_log_debug("[isoch] feeding buffer %lu at 0x%llx",
+			usb_log_debug("[isoch] feeding buffer %zu at 0x%llx",
 			    it - isoch->transfers, it->mfindex);
 			it->error = schedule_isochronous_trb(ep, it);
@@ -345,5 +345,5 @@
 			 * skipped.
 			 */
-			usb_log_debug("[isoch] missed feeding buffer %lu at 0x%llx by "
+			usb_log_debug("[isoch] missed feeding buffer %zu at 0x%llx by "
 				"%llu uframes", it - isoch->transfers, it->mfindex, wd.offset);
 			it->state = ISOCH_COMPLETE;
@@ -411,5 +411,5 @@
 			/* Not allowed to feed yet. Defer to later. */
 			const suseconds_t delay = wd.offset * 125;
-			usb_log_debug("[isoch] delaying feeding buffer %lu for %ldus",
+			usb_log_debug("[isoch] delaying feeding buffer %zu for %ldus",
 			    it - isoch->transfers, delay);
 			fibril_timer_set_locked(isoch->feeding_timer, delay,
@@ -419,5 +419,5 @@
 
 		case WINDOW_TOO_LATE:
-			usb_log_debug("[isoch] missed feeding buffer %lu at 0x%llx by"
+			usb_log_debug("[isoch] missed feeding buffer %zu at 0x%llx by"
 				"%llu uframes", it - isoch->transfers, it->mfindex, wd.offset);
 			/* Missed the opportunity to schedule. Schedule ASAP. */
@@ -432,5 +432,5 @@
 			isoch->last_mf = it->mfindex;
 
-			usb_log_debug("[isoch] feeding buffer %lu at 0x%llx",
+			usb_log_debug("[isoch] feeding buffer %zu at 0x%llx",
 			    it - isoch->transfers, it->mfindex);