Index: uspace/drv/uhci/transfers.c
===================================================================
--- uspace/drv/uhci/transfers.c	(revision 947d78839aee48678e3102bf15a647260383d50d)
+++ uspace/drv/uhci/transfers.c	(revision b9eb93fee84439138da39f6dd8bea65a7370d2dc)
@@ -36,5 +36,5 @@
     usbhc_iface_transfer_out_callback_t callback, void *arg)
 {
-	printf(NAME ": transfer OUT [%d.%d (%s); %u]\n",
+	printf(NAME ": transfer OUT [%d.%d (%s); %zu]\n",
 	    target.address, target.endpoint,
 	    usb_str_transfer_type(transfer_type),
@@ -49,5 +49,5 @@
     usbhc_iface_transfer_out_callback_t callback, void *arg)
 {
-	printf(NAME ": transfer SETUP [%d.%d (%s); %u]\n",
+	printf(NAME ": transfer SETUP [%d.%d (%s); %zu]\n",
 	    target.address, target.endpoint,
 	    usb_str_transfer_type(transfer_type),
@@ -62,5 +62,5 @@
     usbhc_iface_transfer_in_callback_t callback, void *arg)
 {
-	printf(NAME ": transfer IN [%d.%d (%s); %u]\n",
+	printf(NAME ": transfer IN [%d.%d (%s); %zu]\n",
 	    target.address, target.endpoint,
 	    usb_str_transfer_type(transfer_type),