diff --git a/l10n_es_aeat_sii_oca/models/account_move.py b/l10n_es_aeat_sii_oca/models/account_move.py
index bbd96b7c433..8974783103e 100644
--- a/l10n_es_aeat_sii_oca/models/account_move.py
+++ b/l10n_es_aeat_sii_oca/models/account_move.py
@@ -681,7 +681,7 @@ def _compute_sii_description(self):
                     names = invoice.mapped("invoice_line_ids.name") or invoice.mapped(
                         "invoice_line_ids.ref"
                     )
-                    names = [unidecode(x) for x in names]  # Avoid "ugly" chars
+                    names = [unidecode(x) for x in names if x]  # Avoid "ugly" chars
                     description += " - ".join(filter(None, names))
             invoice.sii_description = (description or "")[:500] or "/"