Index: kernel/generic/src/proc/task.c
===================================================================
--- kernel/generic/src/proc/task.c	(revision be069144135afaab9e7c8cee79ffd3504762612c)
+++ kernel/generic/src/proc/task.c	(revision a6ba0c9cb46c31fab5fccc5ab7ff90a3a8cacb82)
@@ -478,5 +478,5 @@
 #ifdef __32_BITS__
 	if (*additional)
-		printf("%-8" PRIu64 " %9lu %7lu", task->taskid,
+		printf("%-8" PRIu64 " %9" PRIua " %7" PRIua, task->taskid,
 		    atomic_get(&task->refcount), atomic_get(&task->active_calls));
 	else
@@ -489,5 +489,6 @@
 #ifdef __64_BITS__
 	if (*additional)
-		printf("%-8" PRIu64 " %9" PRIu64 "%c %9" PRIu64 "%c %9lu %7lu",
+		printf("%-8" PRIu64 " %9" PRIu64 "%c %9" PRIu64 "%c "
+		    "%9" PRIua " %7" PRIua,
 		    task->taskid, ucycles, usuffix, kcycles, ksuffix,
 		    atomic_get(&task->refcount), atomic_get(&task->active_calls));
@@ -501,5 +502,5 @@
 		for (i = 0; i < IPC_MAX_PHONES; i++) {
 			if (task->phones[i].callee)
-				printf(" %" PRIs ":%p", i, task->phones[i].callee);
+				printf(" %zu:%p", i, task->phones[i].callee);
 		}
 		printf("\n");