Index: uspace/app/trace/trace.c
===================================================================
--- uspace/app/trace/trace.c	(revision fb6f1a5becf4ed481c7d009a226723cae1c82b9d)
+++ uspace/app/trace/trace.c	(revision fa36f294e6a3f5cc4a846e9b33621971e0cc3d07)
@@ -49,4 +49,6 @@
 #include <io/keycode.h>
 #include <fibril_synch.h>
+#include <sys/types.h>
+#include <sys/typefmt.h>
 
 #include <libc.h>
@@ -159,5 +161,5 @@
 	if (rc < 0) {
 		printf("Error connecting\n");
-		printf("ipc_connect_task(%lld) -> %d ", task_id, rc);
+		printf("ipc_connect_task(%" PRIdTASKID ") -> %d ", task_id, rc);
 		return rc;
 	}
@@ -275,7 +277,7 @@
 
 	putchar('(');
-	if (n > 0) printf("%ld", sc_args[0]);
+	if (n > 0) printf("%" PRIdSYSARG, sc_args[0]);
 	for (i = 1; i < n; i++) {
-		printf(", %ld", sc_args[i]);
+		printf(", %" PRIdSYSARG, sc_args[i]);
 	}
 	putchar(')');
@@ -972,9 +974,9 @@
 	rc = connect_task(task_id);
 	if (rc < 0) {
-		printf("Failed connecting to task %lld.\n", task_id);
+		printf("Failed connecting to task %" PRIdTASKID ".\n", task_id);
 		return 1;
 	}
 
-	printf("Connected to task %lld.\n", task_id);
+	printf("Connected to task %" PRIdTASKID ".\n", task_id);
 
 	if (task_ldr != NULL)