diff --git a/main.py b/main.py
index 4985aa0..5f74ffe 100755
--- a/main.py
+++ b/main.py
@@ -318,6 +318,7 @@ def adviceLastSN(requestId, modem):
     
 def topupTask(task, modem):
     global LAST_REQUEST_ID
+    global LAST_PRODUCT
     
     if not task:
         return