diff --git a/src/routes/invoices.$invoiceId.tsx b/src/routes/invoices.$invoiceId.tsx
index 1471ea7..9e4c6ef 100644
--- a/src/routes/invoices.$invoiceId.tsx
+++ b/src/routes/invoices.$invoiceId.tsx
@@ -206,6 +206,7 @@ function InvoiceDetail() {
         dueDate: invoice.due_date,
         status: invoice.status,
         notes: invoice.notes,
+        matter: groups.length === 1 ? (groups[0].caseRow?.title ?? null) : null,
       },
       groups: groups.map((g) => ({
         caseNumber: g.caseRow?.case_number ?? "—",