diff --git a/bk_aidk/projects/beken_wss_paopao/main/app_main.c b/bk_aidk/projects/beken_wss_paopao/main/app_main.c
index eb5ed45e..401ab586 100755
--- a/bk_aidk/projects/beken_wss_paopao/main/app_main.c
+++ b/bk_aidk/projects/beken_wss_paopao/main/app_main.c
@@ -260,7 +260,7 @@ static void handle_system_event(key_event_t event)
             while (1)
             {
                 rtos_delay_milliseconds(1);
-                 bk_printf("wait for power off\n");
+                bk_printf("wait for power off\n");
             }