diff --git a/pycroft/helpers/printing/__init__.py b/pycroft/helpers/printing/__init__.py
index bf9b5254b..eb0d6e50e 100644
--- a/pycroft/helpers/printing/__init__.py
+++ b/pycroft/helpers/printing/__init__.py
@@ -31,6 +31,7 @@ class BankAccount(t.Protocol):
     bank: t.Any
     iban: t.Any
     bic: t.Any
+    owner: t.Any
 
 
 class Building(t.Protocol):