diff --git a/market/v1/msg.proto b/market/v1/msg.proto
index cced1d1..10dd9c2 100644
--- a/market/v1/msg.proto
+++ b/market/v1/msg.proto
@@ -65,13 +65,14 @@ message MarketOrder {
   auth.v1.UserIdentityBasic from_identity = 11;
   wallet.v1.Commission commission = 12;
   double completed_amount = 13;
-  string created_at = 14;
-  string updated_at = 15;
-  bool is_public = 16;
-  wallet.v1.TransactionList trx = 17;
-  repeated string tags = 18;
-  repeated string comment = 19;
-  optional MarketOrder source = 20; // purchase is done via this field
+  double available_amount = 14;
+  string created_at = 15;
+  string updated_at = 16;
+  bool is_public = 17;
+  wallet.v1.TransactionList trx = 18;
+  repeated string tags = 19;
+  repeated string comment = 20;
+  optional MarketOrder source = 21; // purchase is done via this field
   // repeated string attachments = 14; // possible files included by
   // seller/buyer
 }