diff --git a/modoboa/extensions/amavis/general_callbacks.py b/modoboa/extensions/amavis/general_callbacks.py
index 76b994e16..f08c9fa4e 100644
--- a/modoboa/extensions/amavis/general_callbacks.py
+++ b/modoboa/extensions/amavis/general_callbacks.py
@@ -64,7 +64,7 @@ def on_mailbox_modified(mailbox):
        not hasattr(mailbox, "old_full_address") or \
        mailbox.full_address == mailbox.old_full_address:
         return
-    user = Users.objects.select_related.get(email=mailbox.old_full_address)
+    user = Users.objects.select_related().get(email=mailbox.old_full_address)
     full_address = mailbox.full_address
     user.email = full_address
     user.policy.policy_name = full_address[:32]