diff --git a/maintenance_request_purchase/models/maintenance_request.py b/maintenance_request_purchase/models/maintenance_request.py
index 934fa318a..7a7a276ae 100644
--- a/maintenance_request_purchase/models/maintenance_request.py
+++ b/maintenance_request_purchase/models/maintenance_request.py
@@ -59,7 +59,10 @@ def _compute_total_purchase_amount(self):
                 po.currency_id._convert(
                     po.amount_total,
                     company_currency,
-                    record.company_id,
+                    # maintenance.request.company_id is optional; use each
+                    # purchase order's own company (always set) so the rate
+                    # context is deterministic and never empty.
+                    po.company_id,
                     date,
                 )
                 for po in record.purchase_order_ids.filtered(
diff --git a/maintenance_request_purchase/readme/CONTRIBUTORS.rst b/maintenance_request_purchase/readme/CONTRIBUTORS.rst
index 0c8996032..98e5e2917 100644
--- a/maintenance_request_purchase/readme/CONTRIBUTORS.rst
+++ b/maintenance_request_purchase/readme/CONTRIBUTORS.rst
@@ -2,3 +2,7 @@
 * Jaime Arroyo
 * Olga Marco
 * Núria Sancho
+
+* `NuoBiT <https://www.nuobit.com>`__:
+
+  * Eric Antones <eantones@nuobit.com>