diff --git a/doc/migration.rst b/doc/migration.rst
index f4616c069d..d2632986bb 100644
--- a/doc/migration.rst
+++ b/doc/migration.rst
@@ -79,7 +79,7 @@ After
          ])
 
      for mandate in mandates:
-         mandate.address = mandate.on_change_party()
+         mandate.on_change_party()
 
      Mandate.save(mandates)