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-rw-r--r--src/backend/taler-merchant-httpd_proposal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/taler-merchant-httpd_proposal.c b/src/backend/taler-merchant-httpd_proposal.c
index 7df17429..13910039 100644
--- a/src/backend/taler-merchant-httpd_proposal.c
+++ b/src/backend/taler-merchant-httpd_proposal.c
@@ -172,7 +172,7 @@ proposal_put (struct MHD_Connection *connection, json_t *order)
off = strftime (buf, sizeof (buf), "%H:%M:%S", tm_info);
snprintf (buf + off, sizeof (buf) - off,
- "%llu\n",
+ "-%llX\n",
(long long unsigned) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX));
json_object_set (order, "order_id", json_string (buf));
}