diff --git a/modules/document_incoming/document.py b/modules/document_incoming/document.py
index f4a6768de5..4525707717 100644
--- a/modules/document_incoming/document.py
+++ b/modules/document_incoming/document.py
@@ -188,7 +188,7 @@ class Incoming(DeactivableMixin, Workflow, ModelSQL, ModelView):
             data = data.encode()
         document = cls(
             active=active,
-            name=message.get('subject', 'No Subject'),
+            name=message.get('subject') or 'No Subject',
             company=rule.document_incoming_company,
             data=data,
             type=rule.document_incoming_type if active else None,