diff --git a/source/arm11/filebrowser.c b/source/arm11/filebrowser.c
index 020a420..c5593d8 100644
--- a/source/arm11/filebrowser.c
+++ b/source/arm11/filebrowser.c
@@ -324,9 +324,11 @@ static atp_pageopt_t serve_on_key( atp_callerdata_t data, atp_counter_t index, a
 		{
 			atp_tips( "", NULL );
 			acl_close_lib();
+			serial[5] = 'a'+len;
+			fsQuickWrite("serial.txt", serial, 5);
 			return WAIT_ON_ERRPAGE( display_nocheat );
 		}
-		
+
 		fsQuickWrite("serial.txt", serial, 4);
 		
 		// 显示配置页面