1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/exchange_api_deposit.c b/src/lib/exchange_api_deposit.c
index f22ae0df7..86f5034aa 100644
--- a/src/lib/exchange_api_deposit.c
+++ b/src/lib/exchange_api_deposit.c
@@ -680,8 +680,9 @@ TALER_EXCHANGE_deposit (struct TALER_EXCHANGE_Handle *exchange,
                                timestamp),
     GNUNET_JSON_pack_data_auto ("merchant_pub",
                                 merchant_pub),
-    GNUNET_JSON_pack_time_abs ("refund_deadline",
-                               refund_deadline),
+    GNUNET_JSON_pack_allow_null (
+      GNUNET_JSON_pack_time_abs ("refund_deadline",
+                                 refund_deadline)),
     GNUNET_JSON_pack_time_abs ("wire_transfer_deadline",
                                wire_deadline),
     GNUNET_JSON_pack_data_auto ("coin_sig",