diff --git a/vas/calc_third_partner.py b/vas/calc_third_partner.py
index 2390f61..fef64db 100644
--- a/vas/calc_third_partner.py
+++ b/vas/calc_third_partner.py
@@ -60,7 +60,7 @@ class S:
         tp_uids = [983565, 231638]
         tp_mids = list()
         for uid in tp_uids:
-            tp_mids = tp_mids.append(self.uid2mid(uid))
+            tp_mids.append(self.uid2mid(uid))
         print(tp_mids)