Index: uspace/app/tester/ipc/ping_pong.c
===================================================================
--- uspace/app/tester/ipc/ping_pong.c	(revision a000878c0dee83a08f032207ffd800c201fca95b)
+++ uspace/app/tester/ipc/ping_pong.c	(revision df6b760f1bd75c44a53207ccec0e9abb8ca6ea0e)
@@ -72,5 +72,5 @@
 	}
 	
-	TPRINTF("OK\nCompleted %llu round trips in %u seconds, %llu rt/s.\n",
+	TPRINTF("OK\nCompleted %" PRIu64 " round trips in %u seconds, %" PRIu64 " rt/s.\n",
 	    count, DURATION_SECS, count / DURATION_SECS);
 	
Index: uspace/app/tester/ipc/register.c
===================================================================
--- uspace/app/tester/ipc/register.c	(revision a000878c0dee83a08f032207ffd800c201fca95b)
+++ uspace/app/tester/ipc/register.c	(revision df6b760f1bd75c44a53207ccec0e9abb8ca6ea0e)
@@ -27,4 +27,5 @@
  */
 
+#include <inttypes.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -41,5 +42,5 @@
 	unsigned int i;
 	
-	TPRINTF("Connected phone %#x accepting\n", icall->in_phone_hash);
+	TPRINTF("Connected phone %" PRIun " accepting\n", icall->in_phone_hash);
 	ipc_answer_0(iid, EOK);
 	for (i = 0; i < MAX_CONNECTIONS; i++) {
@@ -57,14 +58,14 @@
 		switch (IPC_GET_METHOD(call)) {
 		case IPC_M_PHONE_HUNGUP:
-			TPRINTF("Phone %#x hung up\n", icall->in_phone_hash);
+			TPRINTF("Phone %" PRIun " hung up\n", icall->in_phone_hash);
 			retval = 0;
 			break;
 		case IPC_TEST_METHOD:
-			TPRINTF("Received well known message from %#x: %#x\n",
+			TPRINTF("Received well known message from %" PRIun ": %" PRIun "\n",
 			    icall->in_phone_hash, callid);
 			ipc_answer_0(callid, EOK);
 			break;
 		default:
-			TPRINTF("Received unknown message from %#x: %#x\n",
+			TPRINTF("Received unknown message from %" PRIun ": %" PRIun "\n",
 			    icall->in_phone_hash, callid);
 			ipc_answer_0(callid, ENOENT);