Index: uspace/srv/net/nil/eth/eth.c
===================================================================
--- uspace/srv/net/nil/eth/eth.c	(revision 46d4d9f449e7933280b1877c70448602ec0ab0ae)
+++ uspace/srv/net/nil/eth/eth.c	(revision df6b760f1bd75c44a53207ccec0e9abb8ca6ea0e)
@@ -315,5 +315,5 @@
 			device->mtu = ETH_MAX_TAGGED_CONTENT(device->flags);
 		
-		printf("Device %d already exists:\tMTU\t= %d\n",
+		printf("Device %d already exists:\tMTU\t= %zu\n",
 		    device->device_id, device->mtu);
 		fibril_rwlock_write_unlock(&eth_globals.devices_lock);
@@ -407,5 +407,5 @@
 	}
 	
-	printf("%s: Device registered (id: %d, service: %d: mtu: %d, "
+	printf("%s: Device registered (id: %d, service: %d: mtu: %zu, "
 	    "mac: %x:%x:%x:%x:%x:%x, flags: 0x%x)\n",
 	    NAME, device->device_id, device->service, device->mtu,
Index: uspace/srv/net/nil/nildummy/nildummy.c
===================================================================
--- uspace/srv/net/nil/nildummy/nildummy.c	(revision 46d4d9f449e7933280b1877c70448602ec0ab0ae)
+++ uspace/srv/net/nil/nildummy/nildummy.c	(revision df6b760f1bd75c44a53207ccec0e9abb8ca6ea0e)
@@ -175,5 +175,5 @@
 			device->mtu = NET_DEFAULT_MTU;
 		
-		printf("Device %d already exists:\tMTU\t= %d\n",
+		printf("Device %d already exists:\tMTU\t= %zu\n",
 		    device->device_id, device->mtu);
 		fibril_rwlock_write_unlock(&nildummy_globals.devices_lock);
@@ -232,5 +232,5 @@
 	}
 	
-	printf("%s: Device registered (id: %d, service: %d, mtu: %d)\n",
+	printf("%s: Device registered (id: %d, service: %d, mtu: %zu)\n",
 	    NAME, device->device_id, device->service, device->mtu);
 	fibril_rwlock_write_unlock(&nildummy_globals.devices_lock);