diff --git a/membership_extension/models/account_move.py b/membership_extension/models/account_move.py
index 1b841d55..ad017bee 100644
--- a/membership_extension/models/account_move.py
+++ b/membership_extension/models/account_move.py
@@ -44,9 +44,9 @@ def button_cancel(self):
                 lines.write({"date_cancel": False})
         return res
 
-    def post(self):
+    def action_post(self):
         """Handle validated refunds for cancelling membership lines"""
-        res = super().post()
+        res = super().action_post()
         self.filtered(lambda m: (m.move_type == "out_invoice")).mapped(
             "invoice_line_ids.membership_lines"
         ).write({"state": "invoiced"})