diff --git a/lnbits/helpers.py b/lnbits/helpers.py
index ef009e3..b7c3646 100644
--- a/lnbits/helpers.py
+++ b/lnbits/helpers.py
@@ -9,7 +9,7 @@ class MegaEncoder(json.JSONEncoder):
             for k in o.keys():
                 val[k] = o[k]
             return val
-        return o
+        return obj
 
 
 def megajson(obj):