1 files changed, 5 insertions, 2 deletions
diff --git a/src/backend/taler-merchant-httpd_private-post-orders-ID-refund.c b/src/backend/taler-merchant-httpd_private-post-orders-ID-refund.c
index 4300c607..c0e4afb5 100644
--- a/src/backend/taler-merchant-httpd_private-post-orders-ID-refund.c
+++ b/src/backend/taler-merchant-httpd_private-post-orders-ID-refund.c
@@ -108,8 +108,11 @@ TMH_private_post_orders_ID_refund (const struct TMH_RequestHandler *rh,
   struct TALER_Amount refund;
   const char *reason;
   struct GNUNET_JSON_Specification spec[] = {
-    TALER_JSON_spec_amount ("refund", &refund),
-    GNUNET_JSON_spec_string ("reason", &reason),
+    TALER_JSON_spec_amount ("refund",
+                            TMH_currency,
+                            &refund),
+    GNUNET_JSON_spec_string ("reason",
+                             &reason),
     GNUNET_JSON_spec_end ()
   };
   enum TALER_MERCHANTDB_RefundStatus rs;