diff --git a/CRM/Core/Payment.php b/CRM/Core/Payment.php
index c4e4deb2c583..ab955db1497f 100644
--- a/CRM/Core/Payment.php
+++ b/CRM/Core/Payment.php
@@ -1375,6 +1375,7 @@ public function doPayment(&$params, $component = 'contribute') {
       }
     }
     if (is_a($result, 'CRM_Core_Error')) {
+      CRM_Core_Error::deprecatedFunctionWarning('payment processors should throw exceptions rather than return errors');
       throw new PaymentProcessorException(CRM_Core_Error::getMessages($result));
     }
     return $result;