diff --git a/src/pretix/base/invoicing/peppol.py b/src/pretix/base/invoicing/peppol.py
index 819fc66af..0a26b6c10 100644
--- a/src/pretix/base/invoicing/peppol.py
+++ b/src/pretix/base/invoicing/peppol.py
@@ -208,7 +208,7 @@ class PeppolTransmissionType(TransmissionType):
         # Special case Belgium: If a Belgian business ID is used as Peppol ID, it should match the VAT ID
         if address_data.get("transmission_peppol_participant_id").startswith("0208:") and address_data.get("vat_id"):
             if address_data["vat_id"].removeprefix("BE") != address_data["transmission_peppol_participant_id"].removeprefix("0208:"):
-                raise ValidationError(_("The Peppol participant ID does not match your VAT ID."))
+                raise ValidationError({"transmission_peppol_participant_id": _("The Peppol participant ID does not match your VAT ID.")})
 
     def pdf_watermark(self) -> str:
         return pgettext("peppol_invoice", "Visual copy")