diff --git a/sched/init/os_start.c b/sched/init/os_start.c
index 961152ec4b..2feadf0908 100644
--- a/sched/init/os_start.c
+++ b/sched/init/os_start.c
@@ -327,11 +327,13 @@ static struct task_tcb_s g_idletcb[1];
 
 /* This is the name of the idle task */
 
+#if CONFIG_TASK_NAME_SIZE <= 0 || !defined(CONFIG_SMP)
 #ifdef CONFIG_SMP
 static const char g_idlename[] = "CPU Idle";
 #else
 static const char g_idlename[] = "Idle Task";
 #endif
+#endif
 
 /* This the IDLE idle threads argument list.  NOTE: Normally the argument
  * list is created on the stack prior to starting the task.  We have to