diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
index 6ed71153d..6b5d37685 100644
--- a/src/include/taler_signatures.h
+++ b/src/include/taler_signatures.h
@@ -1356,7 +1356,7 @@ struct TALER_ProposalDataPS
  * Used by merchants to return signed responses to /pay requests.
  * Currently only used to return 200 OK signed responses.
  */
-struct PaymentResponsePS
+struct TALER_PaymentResponsePS
 {
   /**
    * Set to #TALER_SIGNATURE_MERCHANT_PAYMENT_OK. Note that