Index: uspace/app/trace/ipcp.c
===================================================================
--- uspace/app/trace/ipcp.c	(revision fb6f1a5becf4ed481c7d009a226723cae1c82b9d)
+++ uspace/app/trace/ipcp.c	(revision 672b22e998fe4b44c45775aa265ee54ebdcc43dc)
@@ -36,4 +36,5 @@
 #include <stdlib.h>
 #include <adt/hash_table.h>
+#include <sys/typefmt.h>
 
 #include "ipc_desc.h"
@@ -200,8 +201,9 @@
 
 	if ((display_mask & DM_IPC) != 0) {
-		printf("Call ID: 0x%lx, phone: %d, proto: %s, method: ", hash,
+		printf("Call ID: %p, phone: %d, proto: %s, method: ", hash,
 			phone, (proto ? proto->name : "n/a"));
 		ipc_m_print(proto, IPC_GET_METHOD(*call));
-		printf(" args: (%lu, %lu, %lu, %lu, %lu)\n", args[1], args[2],
+		printf(" args: (%" PRIuIPCARG ", %" PRIuIPCARG ", %" PRIuIPCARG
+		    ", %" PRIuIPCARG ", %" PRIuIPCARG ")\n", args[1], args[2],
 		    args[3], args[4], args[5]);
 	}
@@ -279,8 +281,10 @@
 
 	if ((display_mask & DM_IPC) != 0) {
-		printf("Response to %p: retval=%ld, args = (%lu, %lu, %lu, %lu, %lu)\n",
-			hash, retval, IPC_GET_ARG1(*answer),
-			IPC_GET_ARG2(*answer), IPC_GET_ARG3(*answer),
-			IPC_GET_ARG4(*answer), IPC_GET_ARG5(*answer));
+		printf("Response to %p: retval=%ld, args = (%" PRIuIPCARG
+		    ", %" PRIuIPCARG ", %" PRIuIPCARG ", %" PRIuIPCARG
+		    ", %" PRIuIPCARG ")\n",
+		    hash, retval, IPC_GET_ARG1(*answer),
+		    IPC_GET_ARG2(*answer), IPC_GET_ARG3(*answer),
+		    IPC_GET_ARG4(*answer), IPC_GET_ARG5(*answer));
 	}