Index: uspace/app/kill/kill.c
===================================================================
--- uspace/app/kill/kill.c	(revision 1e9f8ab55e857ca808bc37b0167fb0a161c48d80)
+++ uspace/app/kill/kill.c	(revision f2b3d3ea3dc1fbb7a2312b326613bcc88a3bfaf5)
@@ -31,5 +31,5 @@
  */
 /**
- * @file Forecfully terminate a task.
+ * @file Forcefully terminate a task.
  */
 
@@ -37,6 +37,7 @@
 #include <stdio.h>
 #include <task.h>
+#include <str_error.h>
 
-#define NAME "kill"
+#define NAME  "kill"
 
 static void print_syntax(void)
@@ -59,12 +60,12 @@
 	if (*eptr != '\0') {
 		printf("Invalid task ID argument '%s'.\n", argv[1]);
-		return 1;
+		return 2;
 	}
 
 	rc = task_kill(taskid);
 	if (rc != EOK) {
-		printf("Failed to kill task with ID %llu (error %d)\n",
-		    (unsigned long long) taskid, rc);
-		return 2;
+		printf("Failed to kill task ID %" PRIu64 ": %s\n",
+		    taskid, str_error(rc));
+		return 3;
 	}