diff --git a/src/protocols/protocol_transaction_out_106.cpp b/src/protocols/protocol_transaction_out_106.cpp
index 5d2175ec..7efd9619 100644
--- a/src/protocols/protocol_transaction_out_106.cpp
+++ b/src/protocols/protocol_transaction_out_106.cpp
@@ -184,7 +184,7 @@ void protocol_transaction_out_106::send_transaction(const code& ec,
         return;
     }
 
-    SEND(transaction{ ptr }, send_transaction, _1, sub1(index), message);
+    SEND(transaction{ ptr }, send_transaction, _1, add1(index), message);
 }
 
 BC_POP_WARNING()