diff --git a/market/v1/msg.proto b/market/v1/msg.proto
index 5ba5249..ca5d25d 100644
--- a/market/v1/msg.proto
+++ b/market/v1/msg.proto
@@ -27,7 +27,7 @@ message MarketOrder {
   wallet.v1.TransactionList trx = 16;
   repeated string tags = 17;
   repeated string comment = 18;
-  optional MarketOrder parent = 19; // purchase is done via this field
+  optional MarketOrder source = 19; // purchase is done via this field
   // repeated string attachments = 14; // possible files included by seller/buyer
 }