diff --git a/ql-application/threadx/interface/custom_app/sleep_wake.c b/ql-application/threadx/interface/custom_app/sleep_wake.c
index 0ef87cb..358af80 100644
--- a/ql-application/threadx/interface/custom_app/sleep_wake.c
+++ b/ql-application/threadx/interface/custom_app/sleep_wake.c
@@ -102,9 +102,13 @@ void enter_sleep_mode(void)
     if (g_in_sleep_mode) return;
     
     printf("enter_sleep_mode\r\n");
+    /* 先排入休眠提示音，再设置交互休眠标志；提示音入口会拦截休眠状态。
+     * 播放线程会唤醒音频芯片，播放结束后由原有空闲计时进入低功耗。 */
+    int prompt_ret = app_play_tips_file(12);
     g_in_sleep_mode = 1;
-    
-	app_play_tips_file(12);
+    if (prompt_ret != 0) {
+        printf("sleep prompt queue failed:ret=%d\r\n", prompt_ret);
+    }
 }
 
 /**