Index: uspace/srv/net/tcp/service.c
===================================================================
--- uspace/srv/net/tcp/service.c	(revision be12474ead2cb098f28d8b1a42e46e304254fcde)
+++ uspace/srv/net/tcp/service.c	(revision 992ffa61925d507ddd9ca906e90fb41d1ddbaacb)
@@ -1136,5 +1136,5 @@
 	n = list_count(&client->cconn);
 	if (n != 0) {
-		log_msg(LOG_DEFAULT, LVL_WARN, "Client with %zu active "
+		log_msg(LOG_DEFAULT, LVL_WARN, "Client with %lu active "
 		    "connections closed session", n);
 
@@ -1150,5 +1150,5 @@
 	n = list_count(&client->clst);
 	if (n != 0) {
-		log_msg(LOG_DEFAULT, LVL_WARN, "Client with %zu active "
+		log_msg(LOG_DEFAULT, LVL_WARN, "Client with %lu active "
 		    "listeners closed session", n);
 		/* XXX Destroy listeners */
Index: uspace/srv/net/udp/service.c
===================================================================
--- uspace/srv/net/udp/service.c	(revision be12474ead2cb098f28d8b1a42e46e304254fcde)
+++ uspace/srv/net/udp/service.c	(revision 992ffa61925d507ddd9ca906e90fb41d1ddbaacb)
@@ -685,5 +685,5 @@
 	if (n != 0) {
 		log_msg(LOG_DEFAULT, LVL_WARN, "udp_client_conn: "
-		    "Client with %zu active associations closed session.", n);
+		    "Client with %lu active associations closed session.", n);
 		/* XXX Clean up */
 	}