diff --git a/dms/models/directory.py b/dms/models/directory.py
index 34127d2d2..c183b8832 100644
--- a/dms/models/directory.py
+++ b/dms/models/directory.py
@@ -625,8 +625,8 @@ def message_new(self, msg_dict, custom_values=None):
             parent_directory._process_message(msg_dict)
             return parent_directory
         names = parent_directory.child_directory_ids.mapped("name")
-        slug = self.env["ir.http"]._slug
-        subject = slug(msg_dict.get("subject", _("Alias-Mail-Extraction")))
+        slugify = self.env["ir.http"]._slugify
+        subject = slugify(msg_dict.get("subject", _("Alias-Mail-Extraction")))
         defaults = dict(
             {"name": unique_name(subject, names, escape_suffix=True)}, **custom_values
         )