Index: uspace/lib/c/include/net/modules.h
===================================================================
--- uspace/lib/c/include/net/modules.h	(revision 7837101e9ef7c5e24437373b9c81b9a15116b460)
+++ uspace/lib/c/include/net/modules.h	(revision 1b59023d265904456c850e31b8b942f8cf34a860)
@@ -49,13 +49,4 @@
 #include <sys/time.h>
 
-/** Converts the data length between different types.
- *
- * @param[in] type_from	The source type.
- * @param[in] type_to	The destination type.
- * @param[in] count	The number units of the source type size.
- */
-#define CONVERT_SIZE(type_from, type_to, count) \
-	((sizeof(type_from) / sizeof(type_to)) * (count))
-
 /** Registers the module service at the name server.
  *
Index: uspace/srv/hw/netif/dp8390/dp8390_module.c
===================================================================
--- uspace/srv/hw/netif/dp8390/dp8390_module.c	(revision 7837101e9ef7c5e24437373b9c81b9a15116b460)
+++ uspace/srv/hw/netif/dp8390/dp8390_module.c	(revision 1b59023d265904456c850e31b8b942f8cf34a860)
@@ -197,5 +197,5 @@
 		return rc;
 	address->value = (char *) (&((dpeth_t *) device->specific)->de_address);
-	address->length = CONVERT_SIZE(ether_addr_t, char, 1);
+	address->length = sizeof(ether_addr_t);
 	return EOK;
 }
Index: uspace/srv/net/il/ip/ip.c
===================================================================
--- uspace/srv/net/il/ip/ip.c	(revision 7837101e9ef7c5e24437373b9c81b9a15116b460)
+++ uspace/srv/net/il/ip/ip.c	(revision 1b59023d265904456c850e31b8b942f8cf34a860)
@@ -442,5 +442,5 @@
 		if (route) {
 			address.value = (char *) &route->address.s_addr;
-			address.length = CONVERT_SIZE(in_addr_t, char, 1);
+			address.length = sizeof(in_addr_t);
 			
 			rc = arp_device_req(ip_netif->arp->phone,
@@ -1005,5 +1005,5 @@
 		destination.value = route->gateway.s_addr ?
 		    (char *) &route->gateway.s_addr : (char *) &dest.s_addr;
-		destination.length = CONVERT_SIZE(dest.s_addr, char, 1);
+		destination.length = sizeof(dest.s_addr);
 
 		rc = arp_translate_req(netif->arp->phone, netif->device_id,