1 files changed, 1 insertions, 1 deletions
diff --git a/src/main.c b/src/main.c
index c841a8a..374cde6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1562,7 +1562,7 @@ launch_payment (struct Product *product)
   /* create the json object for the order request */
   if (NULL != product->preview)
   {
-    orderReq = json_pack ("{ s:s, s:{s:s, s:s, s:o}, s:o, s:s, s:o }",
+    orderReq = json_pack ("{ s:s, s:{ [ s:s, s:s, s:o ]}, s:o, s:s, s:o }",
                           "summary", product->description,
                           "products",
                           /* */ "description", product->description,