diff --git a/gentong.js b/gentong.js
index 652dd7a..3000550 100644
--- a/gentong.js
+++ b/gentong.js
@@ -379,6 +379,9 @@ function responseCodeFromMessage(message) {
     else if (message.toLowerCase().indexOf('gagal') >= 0) {
         return '40';
     }
+    else if (message.toLowerCase().indexOf('stok sementara tidak tersedia') == 0) {
+        return '13';
+    }
 
 
     return;